IBM Terminology

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

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 T1

A digital trunking facility standard used in the United States and elsewhere, capable of transmitting and receiving 24 digitized voice or data channels. Signaling can be imbedded in the voice channel transmission when robbed-bit signaling is used. The transmission rate is 1544 kilobits per second. See also E1.

 T1/D3

A framing format used in T1 transmission.

 T1/D4

A framing format used in T1 transmission.

 tabbable element

In Web page creation, a page element that can be reached using the tab key.

 tab character

A character that indicates that printing or displaying should start at the next horizontal position on the current line. The tab is designated by '\t' in the C language and is named in the portable character set.

 tab index

In Web page creation, an attribute that allows the directed use of tab stops to change the default navigation through a page.

 table

(1) In a relational database, a database object that consists of a specific number of columns and is used to store an unordered set of rows. See also base table, temporary table, view.

(2) An orderly arrangement of data in rows and columns that can contain numbers, text, or a combination of both.

(3) In COBOL, a set of logically consecutive data items that are defined in the Data Division with the OCCURS clause.

(4) In RPG, a series of elements with like characteristics. A table can be searched for a uniquely identified element, but elements in a table cannot be accessed by their position relative to other elements.

 table analysis

An analysis process that consists of primary key analysis and the assessment of multicolumn primary keys and potential duplicate values.

 table builder services message (TBSM)

A message issued by a table builder module.

 table check constraint

See check constraint.

 table collocation

In a partitioned database environment, a state that occurs when two tables that have the same number of compatible partitioning keys are stored in the same database partition group. When this happens, the DB2 database management system can perform the join or subquery processing at the database partition where the data is stored.

 table-controlled partitioning

A type of partitioning in which partition boundaries for a partitioned table are controlled by values that are defined in the CREATE TABLE statement.

 table designator

An exposed name used to qualify a column name. See also exposed name.

 table element

In COBOL, a data item that can be referred to in a table.

 table expression

An expression that creates a temporary result table from a query. For example, a table expression might be a query that selects all of the managers from several departments and further specifies that they have over 15 years of working experience and are located at the main branch.

 table file

In RPG, an input file that contains a table.

 table function

A function that receives a set of arguments and that returns a table to the SQL statement that references the function. A table function can be referenced only in the FROM clause of a subselect. See also function, user-defined function, routine.

 table locator

A mechanism that allows access to trigger tables in SQL or from within user-defined functions. A table locator is a fullword integer value that represents a transition table. See also transition table.

 table lock

A lock on a table of data. See also row identifier, row lock.

 table-mode processing

In SQL replication, a type of replication subscription-set processing in which the Apply program retrieves all of the data from the source CD table, applies the data (one member at a time) to each target table, and finally commits its work. See also transaction-mode processing.

 table object ID

Internal logical identifier for a table. In DB2 Database for Linux, UNIX, and Windows, table object IDs for each table in a database are stored in the TABLEID column of the SYSCAT.TABLES catalog view.

 table of contents (TOC)

The list of documents and folders that are contained in a folder or workbasket. Search results are displayed as a folder table of contents.

 table pair

A set of tables used for processing specifications: the JES2 table provides the default processing specifications and the user table provides updates or deletions to the default processing specifications. See also dynamic table, JES2 table, user table.

 table partitioning

A data organization scheme in which table data is divided across multiple data partitions according to values in one or more partitioning columns of the table. Data from a given table is partitioned into multiple storage objects, which can be in different table spaces, based on the specifications that are provided in the PARTITION BY clause of the CREATE TABLE statement. See also data partition, database partitioning.

 table-partitioning key

An ordered set of one or more columns whose values are used to determine in which data partition each table row belongs. See also distribution key.

 table queue

A mechanism for transferring rows between database partitions. Table queues are distributed row streams with simplified rules for the insertion and removal of rows. Table queues can also be used to deliver rows between different processes in a single-partition database.

 table reference character (TRC)

A numeric character corresponding to the order in which font character sets have been specified. The TRC is used to select a font character set during printing.

 table space

(1) A logical unit of storage in a database. In DB2 for z/OS, a table space is a page set and can contain one or more tables. In DB2 Database for Linux, UNIX, and Windows, a table space is a collection of containers, and the data, index, long field, and LOB portions of a table can be stored in the same table space or in separate table spaces. See also page set, container.

(2) A page set that is used to store the records in one or more DB2 for z/OS tables. See also segmented table space.

(3) A logical unit of storage in a database.

 table space container

An allocation of space to a table space. Depending on the table space type, the container can be a directory, device, or file.

 table space ID

Internal logical identifier for the primary table space for an object. In DB2 Database for Linux, UNIX, and Windows, table space IDs for each table space in a database are stored in the TBSPACEID column of the SYSCAT.TABLES catalog view.

 table space set

A set of table spaces and partitions that should be recovered together because the tables contained in the table spaces have dependencies on one another. The dependencies can, for example, be between parent table and descendent table or between base table and auxiliary table.

 tab stop

In VisualAge RPG, a control setting that determines if a control can be selected by using the tab key.

 tachometer

A part that determines speed of rotation.

 TACLE

See terminal abnormal condition line entry.

 TACS

See Total Access Communication System.

 TAE

See text analysis engine.

 tag

(1) The statements of the user interface manager (UIM) tag language. Tags describe the actions, format, and data of the panel. Tags are used to define the formatting of help information.

(2) One or more characters attached to a set of data (for example, a field or document element) that contain information about the set, including its identification.

(3) A text string attached to any instance of a word in a grammar. A tag can be used to distinguish two occurrences of the same word in a grammar, or to identify more than one word in a grammar as having the same meaning.

(4) In markup languages such as SGML, XML, and HTML, a token representing the start or end of an element.

(5) A type of structured field used for indexing in an AFP document. Tags associate an index attribute-value pair with a specific page or group of pages in a document.

(6) A mechanism used to identify certain attributes having some bearing on handling of character data. Some examples are character set identifier, code page identifier, language identifier, country identifier, and encoding scheme identifier.

(7) In UN/EDIFACT EDI Standards, the segment identifier. In export and import, a code that is assigned to each field in the database and used to identify the field in the export file. Such export files are known as tagged files.

(8) A word or phrase that users create and assign to an asset. Users create tags to develop search criteria that is meaningful to themselves.

 tag content

The text associated with a tag.

 Tagged/Delimited String Format (TDS Format)

The physical representation of a message in the MRM domain that has a number of data elements separated by tags and delimiters.

 Tagged Image File Format (TIFF)

A file format for storing high-quality graphics.

 tagged value

The explicit definition of a property as a name-value pair. In a tagged value, the name is referred as the tag. Certain tags are predefined in the UML; others may be user defined. Tagged values are one of three extensibility mechanisms in UML. See also constraint.

 Tag Image File Format-Fax (TIFF-F)

A graphic file format used to store and exchange scanned fax images.

 taglib directive

In a JSP page, a declaration stating that the page uses custom tags, defines the tag library, and specifies its tag prefixes. (Sun)

 tag library

In JSP technology, a collection of tags identifying custom actions described using a taglib descriptor and Java classes. A JSP tag library can be imported into any JSP file and used with various scripting languages. (Sun)

 TAI

See trust association interceptor.

 tail

In REXX, the part of a compound symbol that follows the stem. A tail can consist of constant symbols, simple symbols, and periods.

 takeover

In an XRF environment, the process by which the failing active IMS is released from its XRF sessions with terminal users and replaced by an alternate IMS.

 takeover condition

An event in the active that causes IMS in the alternate to request a takeover.

 takeover phase

The replacement of the failing active IMS by the alternate IMS.

 takeover time

In XRF, the elapsed time between the occurrence of a failure, the completion of switching all terminals to the alternate CICS system, and the running of the first user transaction.

 tampering

A breach of communication security in which information in transit is changed or replaced and then sent on to the recipient. See also eavesdropping, impersonation.

 tangent

The single point at which a straight line meets a curve or surface.

 tap

To use a stylus to interact with a handheld device.

 TAP

See Telocator Alphanumeric Protocol.

 tape cartridge

A case containing a reel of magnetic tape that can be put into a tape unit without stringing the tape between reels.

 tape configuration database (TCDB)

The set of tape library records and tape volume records that reside in integrated catalog facility (ICF) volume catalogs and describe the current tape library configuration.

 tape controller

A logic card located in some tape units that controls input/output tape devices and synchronizes their operation with the operation of the system as a whole.

 tape device

A collection of tape units that share a model type and serial number, such as all the logical unit numbers (LUNs) of a tape library. See also tape unit.

 tape drive

A device used to move magnetic tapes, as well as to read and write information onto those tapes.

 tape file

A device file to support a tape device.

 tape label

A tape record that identifies a magnetic tape volume and the data sets on that volume.

 tape librarian

The person who manages the tape library. This person is a specialized storage administrator.

 tape library

(1) A device that includes a selection of cartridges in a common (secure) area within access of one or more automated removable media (ARM).

(2) A set of equipment and facilities that support an installation's tape environment. The tape library can include tape storage racks, a set of tape drives, and a set of related tape volumes mounted on those drives. See also Automated Tape Library Dataserver, system-managed tape library, manual tape library.

 tape library data server

An IBM hardware device that maintains the tape inventory that is associated with a set of tape drives. A tape library data server also manages the mounting, removal, and storage of tapes.

 tape mark

A unique mark written on the tape to distinguish file boundaries.

 tape mount management

The methodology used to optimize tape usage in order to decrease the number of tape mounts and increase the amount of data on each tape. This optimization is accomplished by redirecting appropriate tape requests to disk and collecting the data in larger amounts on tape soon after the applications are completed. This methodology also reduces the time required to run the application.

 tape reel

A round device on which magnetic tape is wound.

 tape storage group

A collection of tape volumes that contain private user data. A volume becomes part of the tape storage group when it is mounted to satisfy a scratch volume request for the storage group, or when it is entered into one of the tape libraries and assigned to the tape storage group by the cartridge entry process. The volume is removed from the tape storage group when it is returned to scratch after the data sets on it have expired. See also storage group.

 tape subsystem

A magnetic tape subsystem consisting of a controller and magnetic tape devices, which allows for the storage of user data on tape cartridges. See also storage subsystem.

 tape table of contents (TTOC)

In DFSMShsm, the record that describes a tape volume and the data sets (migrated or backup versions) that reside on that tape.

 tape unit

(1) The physical enclosure containing the tape drive.

(2) A tape device or a robotics controller that is visible over a storage network. A tape unit is a member of a single storage network (of 1 - n fabrics), but can have 1 - n equivalent paths. See also tape device.

 tape volume

The recording space on a single tape cartridge or reel. See also shelf-resident tape volume.

 tape volume table of contents (TVTOC)

Information about a tape data set that RACF stores in the TAPEVOL profile for the volume on which the data set resides. The TVTOC includes the data set name, data set sequence number, creation date, and an indicator as to whether a discrete tape data set profile exists.

 target

(1) The program or system to which a request for files or processing is sent.

(2) In VisualAge RPG, a part that receives a target event from a source part whenever the state of the source part changes.

(3) In SEU, a line command, such as B (Before) or A (After), that specifies the destination for other line commands such as C (Copy) or M (Move).

(4) The destination for an action or operation.

(5) A collection of logical units (LUs) that are directly addressable on the network. The target corresponds to the server in a client-server model.

(6) A storage device on a fibre-channel network.

(7) In distributed data management (DDM), the platform that fulfills a request for remote data. A target is also known as a server. See also Distributed FileManager, source.

(8) A Small Computer System Interface (SCSI) device that acts as a subordinate to an initiator and consists of a set of one or more logical units (LUs), each with an assigned logical unit number (LUN). The LUs on the target are typically I/O devices. A SCSI target is analogous to an S/390 control unit; a SCSI initiator is analogous to an S/390 channel; and a SCSI LU is analogous to an S/390 device. See also Small Computer System Interface, initiator.

(9) A value that a Key Performance Indicator (KPI) should achieve, such as "300" or "5 days."

 TARGET

See Trans-European Automated Real-Time Gross Settlement Express Transfer.

 targetable command

A command that can be executed on a different target container. A targetable command invocation incurs some overhead; making the task command not targetable can improve the performance of the overall command framework.

 target based map

A map based on the order elements that are defined in the target document definition.

 target catalog entry

A promotional product or SKU that is defined as a merchandising association. See also source catalog entry.

 target CDD

A customization definition document (CDD) to which placeholders have been added, and for which placeholder values have been specified. A target CDD describes a particular target customization definition.

 target CI

A configuration item (CI) that is expected to be affected by a change or a release. A target CI is defined when a request for change (RFC) is created, when an implementation or software distribution task is defined, and during define targets tasks that can occur throughout a process.

 target component

A component that is the final target of a client service request.

 target customization definition

A customization definition that describes a changed version of a current customization definition. Each target customization definition has a target CDD that describes it.

 target data queue program

In System i Access, a series of programs that receive requests for data manipulation from the source data queue program. Target data queue programs also send data and replies (to previous requests) to the source data queue program.

 target directory

In VisualAge RPG, the directory in which the compiled VRPG application is stored.

 target distributed data manager (TDDM)

In a distributed data management network, programming support that translates the DDM requests received from a source system into data management or SQL requests on the target (or remote) system. See also source distributed data manager.

 target document

A translated version of a document.

 target document definition

A description of the document layout used to create an output document from a translation.

 target document definition window

One of the pages on the Details tab of the Data Transformation Map Editor and the Functional Acknowledgement Map Editor. It displays the target document definition.

 targeted e-mail

A means of communicating a campaign through e-mail to specific recipients based on customer profiling.

 target event

In VisualAge RPG, an event that a target part receives whenever the state of a source part changes.

 target filter

A filter that is defined for each capability set and is based on the attributes defined for a target instance.

 target folder

In VisualAge RPG, the folder where the application (composite project) will be created.

 target host

See task endpoint.

 target library (TLIB)

A data set that contains all or part of a product after it is installed from a distribution library.

 target library high-level qualifier (thlqual)

A high-level qualifier for z/OS target data set names.

 target logical partition

In logical partition (LPAR) mode, the current or immediate LPAR being used or displayed.

 target namespace

A unique logical location for information about the service that associates a namespace with a WSDL location.

 target program

(1) In communications, the program that is started on the remote system at the request of the source system. See also source program.

(2) In display station pass-through, a program that runs on the remote system.

(3) In VisualAge RPG, the object to be built by the project, such as a Dynamic Link Library (DLL).

 target queue manager

See remote queue manager.

 target recovery time

The amount of time estimated by the system that it will need to recover access paths during an initial program load (IPL) after an abnormal system end. Actual performance may range around the target.

 target region

In BTS, the CICS region on which a routed process or activity executes. See also requesting region, routing region.

 target release

(1) The release of the operating system on which a user intends to use an object being created, or intends to restore or use an existing object. See also source release.

(2) In upgrades, the version, release, and modification level of software that is to be installed.

 target segment

In secondary indexing, the segment to be retrieved.

 target server

(1) A database that contains replication target tables.

(2) In upgrades, the planned hardware configuration and software level that exists when the upgrade is completed.

(3) In Q replication and SQL replication, a database or subsystem that contains replication target tables or procedures.

 target service

A service that exists outside of the gateway.

 target system

(1) The system that receives a request from another system. See also source system.

(2) In upgrades, the planned hardware configuration and software level which will exist when the upgrade is completed.

(3) A managed system on which an IBM Director task is performed.

 target table

(1) In SQL replication, a table that is the destination for changes from a registered replication source. A target table can be a user copy table, a point-in-time table, a base aggregate table, a change aggregate table, a CCD table, or a replica table. See also Apply program, source table, replication target.

(2) In Q replication, a table that is the destination for replicated changes from a source that is part of a Q subscription.

 target workstation

A system identified for a Common Inventory Technology (CIT) installation.

 target zone

In the System Modification Program/Extended (SMP/E), a collection of VSAM records describing the target system macros, modules, assemblies, load modules, source modules, and libraries copied from distribution libraries (DLIBs) during system generation, and the system modifications (SYSMODs) applied to the target system.

 tariff

The fee the packet-switching data network charges a user for sending data. The tariff is usually based on the number of packets sent over the network.

 task

(1) In the Task Center, a unit of work and its associated schedule and task actions. A task can be set to run on a schedule and can perform various actions based on the success or failure of the task. DB2 scripts, operating system scripts, and warehouse steps are all examples of tasks. See also step, task action.

(2) A process and the procedures that run the process.

(3) A unit of work to be accomplished by a device or process.

(4) An activity that has business value, is initiated by a user, and is performed by software.

(5) In a Tivoli environment, the definition of an action that must be routinely performed on various managed resources throughout the network. A task defines the executables to be run; the authorization role required to execute the task; and the user or group name under which the task will execute.

(6) In CICS, a single instance of the execution of a transaction.

(7) A unit of work representing one of the steps in a process.

(8) The basic building blocks in the model. Each task performs some function. Visually, a task represents the lowest level of work that can be portrayed in a process.

(9) In Tivoli Intelligent Orchestrator, an action that runs a deployment job on one or more target devices. A deployment job can include one or more job items that correspond to workflows.

(10) The smallest unit of work in a workspace that can be assigned to one Content Contributor. See also workspace, task group, workspace content contributor.

(11) A scheduled project activity to which one or more resources can be assigned.

(12) A work item that an administrator performs, for example: granting permissions and adding users to a community.

(13) An action performed by the provisioning server on a host. Examples of tasks are deployment, creating cloning profiles, and detecting the currently installed operating system.

 task action

In the Task Center, an action that is performed based on the completion status of a particular task. For example, "If Task A completes successfully, run Task B" and "If Task Z fails, disable the schedule of Task Y," both "run Task B" and "disable the schedule of Task Y" are task actions. See also step, task.

 task category

A string that is associated with any number of tasks in the Task Center for easier administration of related tasks. For example, a user can create a task category named "Payroll," then group all of the payroll-related tasks in that category.

 Task Center

In the DB2 database management system, the graphical interface for organizing task flow, scheduling tasks, and distributing notifications about the status of completed tasks.

 task command

A command that implements a specific application logic. In general, a controller command and a set of task commands together implement the application logic for a URL request. See also controller command.

 task control area (TCA)

An area of main storage acquired by CICS when a task is first dispatched. It is used to control the processing of the task. Once acquired, the TCA exists until the task is terminated. It contains the current status of the task, its relative dispatching priority, and parameters and information being passed between CICS and the application program. During execution of the task, the user can change the priority through task control services; further processing of the task is scheduled accordingly.

 task control block (TCB)

A z/OS control block that is used to communicate information about tasks within an address space that is connected to a subsystem. See also address space connection.

 task driver

The function that interacts with the appropriate Tivoli software to perform a task. Also, if the respective task has a user interface, the task driver provides that interface.

 task dump

A copy from memory of a program that failed along with its associated data.

 task endpoint

In a Tivoli environment, the agent that is the ultimate recipient for any type of Tivoli operation.

 task global table (TGT)

table containing information about addresses, the length of working storage, and the program start address.

 task group

The smallest unit of work in a workspace that can be committed to production-ready data. See also workspace, task, commit, production-ready data, workspace manager, workspace task group approver, quick publish.

 task library

(1) In a Tivoli environment, a container in which a Tivoli administrator can create and store tasks and jobs.

(2) A class library that provides the facilities to write programs that consist of tasks.

 Task Library Language (TLL)

In a Tivoli environment, a programming language used to define a task library. The TLL definition can be used to copy a task library from one installation to another. The TLL also allows the arguments for each task to be described such that graphical user interface tools can interpret them and present an interface for operators who want to create the tasks.

 task manager

In the Windows operating system, the function that controls the starting and stopping of programs.

 taskpad

In System i Navigator, a view of system tasks that lets a user interact with i5/OS operating system functions. A taskpad contains a set of interrelated tasks that either perform a function or launch help that explains how to perform a function.

 task-related user exit (TRUE)

A user exit program that is associated with specified events in a particular task, rather than with every occurrence of a particular event in CICS processing (as is the case with global user exits). See also global user exit, resource manager interface.

 task status

Indication of the state of completion of a task and whether any errors occurred when the task was running.

 task swapper

A function, introduced with DOS 5.00, that allows the user to switch from one application to another without ending either application. With the task swapper function, only one application is active at any time. The active program is the application that is currently running; all other applications are suspended until the user switches to that application.

 task switching

The overlapping of I/O operations and processing between several tasks.

 task template

A group of elements which can be customized on a host computer. They are either deployment parameters or graphical user interface elements which condition the appearance of the target computer screen when Tivoli Provisioning Manager for OS Deployment is managing the computer. See also deployment scheme.

 tax category

Indicates the different categories of tax a store may be required to collect, such as federal, state or provincial, and municipal tax. Each tax category must be assigned one of the tax types; either sales or shipping.

 taxonomy

(1) A dictionary that enables users to search for synonyms of their query terms when they search a collection. See also category tree.

(2) The hierarchical classification of information according to a known system that is used to easily discuss, analyze, or retrieve that information.

 tax type

Indicates the type of tax; either sales or shipping. Each tax type has its own unique set of tax categories.

 Tb

See terabit.

 TB

See terabyte.

 TBSM

See table builder services message.

 TC

See test control.

 TCA

See task control area.

 TCAM

See Telecommunications Access Method.

 TCAP

See transaction capabilities application part.

 TCB

(1) See task control block.

(2) See Trusted Computing Base.

(3) See transmission control block.

 TCDB

See tape configuration database.

 TCDBplex

A group of one or more systems or sysplexes, or both, that share the same tape configuration database (TCDB). The individual systems in the TCDBplex share access to one or more tape library data servers and to a common pool of scratch volumes in each tape library. They can also share access to the set of private volumes in each tape library.

 tc driver

See automation package.

 TCO

See total cost of ownership.

 TCP

See Transmission Control Protocol.

 TCP62

SNA logical unit type 62 (LU62) protocol encapsulated in TCP/IP. This allows APPC applications to communicate over a TCP/IP Network without changes to the applications.

 TCP ACK storm

A denial-of-service attack on a server in which a hacker or cracker secretly inserts data into a client/server session in an attempt to disrupt the session. The resulting acknowledgements (ACKs) bounce back and forth and a TCP ACK storm ensues after the hacker has hijacked multiple client/server sessions.

 TCP channel

A type of channel within a transport chain that provides client applications with persistent connections within a local area network (LAN).

 TCPI

See to complete performance index.

 TCP/IP

See Transmission Control Protocol/Internet Protocol.

 TCP/IP-attached

In PSF, pertaining to a device that is linked to the OS/390 system through a TCP/IP network and receives data from the OS/390 system using the application-layer IBM protocol for IPDS printers. Some TCP/IP-attached printers require the i-data 7913 IPDS Printer LAN Attachment. See also SNA-attached.

 TCP/IP Connectivity Utilities

The IBM licensed program that provides a collective set of industrial communications protocols to support connectivity functions for both local and wide area networks.

 TCP/IP load balancing

The ability to distribute TCP/IP connections across target servers.

 TCP/IP monitoring server

A runtime environment that monitors all requests and responses between a Web browser and an application server, as well as TCP/IP activity.

 TCP/IP port

A 2-byte value that identifies a TCP/IP network application within a TCP/IP host.

 TCP/IP stack

The layered suite of protocols that comprise TCP/IP.

 TCS

See terminal control system.

 tcsh

See Tenex C shell.

 TCT

See terminal control table.

 TCTE

See terminal control table terminal entry.

 TCTLE

See terminal control table line entry.

 TCTSE

See terminal control table system entry.

 TCTTE

See terminal control table terminal entry.

 TCTUA

See terminal control table user area.

 TCU

See transmission control unit.

 TD

(1) See transient data.

(2) See intrapartition transient data.

 TDCC

See Transportation Data Coordinating Committee.

 TDD

See Telecommunications Device for the Deaf.

 TDDM

See target distributed data manager.

 TDF

See time differential factor.

 TDLC

See twinaxial data link control.

 TDMA

See Time Division Multiple Access.

 TDS Format

See Tagged/Delimited String Format.

 TDT

See transaction dump table.

 TE

See terminal equipment.

 TE1

See terminal equipment 1.

 TE2

See terminal equipment 2.

 TEAC

See time variance at completion.

 team development

The practice of several members of a team contributing to a single project, with the potential for multiple team members to work in parallel on the same files.

 teaming

The grouping of two to four ports or adapters to increase transmission and reception throughput. Teaming creates a single, high-speed, fault-tolerant link that provides load balancing for both outbound and inbound traffic. See also adapter load balancing.

 team support

The component that interacts with a repository to share and version projects and project data. See also version control.

 TEB

See terminal error block.

 technical authority

The member of a project team who is authorized to decide whether and how to implement a change request. The technical authority defines change tasks, and estimates the effort of engineering the work tasks, corresponding to a change request.

 technical information exchange (TIE)

A part of the electronic customer support function that allows a user to send files to and receive files from a remote support system, and to search for information on a remote support system. The files are sent and received through a remote support network.

 technology adapter

An adapter that is designed for interactions that conform to a specific technology. The WebSphere Adapter for FTP, for example, can be an intermediary through which an integration broker sends data to a file system residing on a local or remote FTP server.

 technology-independent machine interface (TIMI)

The lowest visible architectural layer of the server. TIMI defines the high-level machine instruction set and application programming interface that is independent of the underlying implementation. This allows the underlying hardware and Licensed Internal Code to evolve over time to take advantage of technology advances without affecting the user-level interface.

 TEI

See terminal endpoint identifier.

 telecommunication

The transmission of data between computer systems over telecommunication lines and between a computer system and remote devices.

 telecommunication line

The part of a data circuit external to the equipment that connects to a data-switching exchange.

 telecommunication program PCB (TPPCB)

The PCB that supports communication between an application program and a terminal or other application program. There are two types of TP PCBs: I/O PCB and alternate PCB.

 Telecommunications Access Method (TCAM)

An access method used to transfer data between main storage and remote or local storage.

 Telecommunications Device for the Deaf (TDD)

A telephony device with a QWERTY keyboard and a small display and, optionally, a printer.

 Telecommunication Standardization Sector (ITU-T)

Formerly known as the International Telegraph and Telephone Consultative Committee (CCITT). As of March 1, 1993, recommendations from this group will be known as ITU-T Recommendations. Recommendations made before March 1, 1993, will continue to be known as CCITT Recommendations.

 telephone call state

In telephony, the condition of a telephone call that reflects what the past action on that call has been and what the next set of actions may be.

 telephone input field

A field type that contains information entered by a caller using pushbutton signals.

 telephony

The use or operation of systems for the transmission of voice or data communications between separate points.

 teleprocessing

Processing data that is received from or transmitted to a remote location by way of communication channels.

 Teleprocessing Network Simulator (TPNS)

A program used to test new functions before they encounter production volumes.

 teleprocessing request block (TPRB)

A function used by NPM to control input/output requests to or from terminals to files.

 teletypewriter (TTY)

Originally an electromagnetic device consisting of a combined keyboard and printer used to communicate over telephone lines or other wired serial connections. The abbreviation TTY is now used to describe any serial teletypewriter-like connection.

 teletypewriter exchange service (TWX)

Teletypewriter service in which suitably arranged teletypewriter stations are provided with lines to a central office for access to other such stations throughout the U.S. and Canada. Both baudot- and ASCII-coded machines are used. Business machines may also be used, with certain restrictions.

 Telex Correspondents File

A file that stores data about correspondents. When the user enters the corresponding nickname in a Telex message, the corresponding information in this file is automatically retrieved and entered into the Telex header area.

 telex header area

The first part of the telex message. It contains control information for the telex network.

 telex interface program (TXIP)

A program that runs on a Telex front-end computer and provides a communication facility to connect MERVA ESA with the Telex network.

 Telex Link

The MERVA ESA component used to link to the public telex network via a Telex substation.

 Telex substation

A unit comprised of the following: Telex Interface Program, a Telex front-end computer, and a Telex box.

 Telnet

In TCP/IP, a protocol that provides remote-terminal connection service. Telnet enables users of one host to log on to a remote host and interact as if they were directly attached terminal users of that host.

 Telocator Alphanumeric Protocol (TAP)

An industry-standard protocol for the input of paging requests.

 TEMA

See Tivoli Enterprise Monitoring Agent.

 template

(1) A pattern to help the user identify the location of keys on a keyboard, functions assigned to keys on a keyboard, or switches and lights on a control panel.

(2) An object used to create new objects of the same type. The newly created object has the same characteristics as the template.

(3) In REXX, a guide that allows strings to be parsed by words (delimited by blanks), by explicit matching of strings, or by specifying numeric positions.

(4) A family of C++ classes or functions with variable types.

(5) A DB2 utilities output data set descriptor that is used for dynamic allocation. A template is defined by the TEMPLATE utility control statement.

(6) In WebSphere Commerce, a predefined skeleton or pattern that determines how information displays on a Web page. The template defines characteristics such as the location and type of text and images, and background color.

(7) A model of a new Notes database. If it is a design template, it will update database design elements created from the template.

(8) A standard layout used in such system communications as e-mail, approval requests, and error messages.

(9) A HATS resource that describes the relatively static portion of the Web pages presented by the HATS application, including a banner and navigation area.

(10) A predefined structure for an artifact.

(11) In the Reusable Asset Specification (RAS), a special kind of pattern, providing a common solution to a common problem in a given context. A template is the most flexible in terms of manipulating its participants, as compared to mechanisms, frameworks, and component systems.

(12) A grouping of elements that share common properties. These properties may be defined only once, at the template level, and are inherited by all elements using the template. In Java terms, this is an abstract class.

(13) An XML representation of the instructions that call the promotions engine.

(14) In UML modeling, a model element with unbound formal parameters that you can use to define families of classifiers, packages, and operations. A parameterized model element that describes or identifies the pattern for a group of model elements of a particular type.

(15) A generalized project or deliverable plan without populated data for use by project managers for planning a project.

(16) A predefined process of activity roadmap that can be applied to specific process workflows and modified to meet the needs of a specific workflow. Templates can be created, edited, cloned, or deleted.

 template argument

In UML modeling, the actual value that is assigned to a template parameter to make the template a usable model element. See also template parameter.

 template class

A C++ class instance generated by a class template.

 template file

In Lotus Notes, a file with the extension NTF that contains the structure for the database -- that is, forms, folders, and views -- but does not contain documents. Domino Designer comes with a collection of templates that can be used to create system and application databases.

 template function

A C++ function generated by a function template.

 template instantiation

The act of creating a new definition of a function, class, or member of a class from a template declaration and one or more template arguments.

 template library

The database, known as the Portal Template Catalog, that stores place template specifications and portlets forms, subforms, and profiles.

 template parameter

In UML modeling, a formal parameter that, after it is bound to an actual value, makes a template a usable model element. See also template argument.

 template tree view

The tree viewer that displays the template definitions, scenario tree, and message file of the collaboration template. Display of the template tree view is optional.

 temporary data set

An uncataloged data set with a name that begins with an ampersand (&) or two ampersands (&&) and that is normally used only for the duration of a job or interactive session. See also permanent data set.

 temporary dynamic queue

A dynamic queue that is deleted when it is closed. Temporary dynamic queues are not recovered if the queue manager fails, so they can contain nonpersistent messages only. See also permanent dynamic queue.

 temporary field

A field that is used during calculations. The variable that is used in the temporary field is not stored.

 temporary file system (TFS)

A temporary, in-memory physical file system that supports in-storage mountable file systems. Normally, a TFS runs in the kernel address space, but it can be run in a logical file system (LFS) colony address space.

 temporary group

A list of existing calendars used to schedule items for a group of users in one step. The list can be used in the current session only, after which the list is deleted.

 temporary library

A library that is automatically created for each job to contain temporary objects that are created by the system for that job. The objects in the temporary library are deleted when the job ends. The system name for temporary library is QTEMP.

 temporary object

An object, such as a data path or compiler work area, that is automatically deleted by the system when the operating system is loaded.

 temporary storage (TS)

(1) The CICS facility that allows application programs to store data in a temporary storage queue for later retrieval.

(2) See working storage.

 temporary storage group identification (TSGID)

A control block containing entries addressing each element of a temporary storage queue. Each temporary storage queue has at least one TSGID. Extra TSGID entries are allocated as required.

 temporary storage queue

A queue of data items which can be read and reread, in any sequence. The queue is created by a task, and persists until the same task, or a another task deletes it.

 temporary storage table (TST)

A table describing temporary storage queues and queue prefixes for which CICS is to provide recovery or security or that are located on a remote CICS system.

 temporary storage unit table (TSUT)

A table that contains an entry for each temporary storage identifier. Each entry addresses either a temporary storage record in main or in auxiliary storage, or, in the case of a temporary storage queue, the TSGID.

 temporary table

A table that holds temporary data. Temporary tables are useful for holding or sorting intermediate results from queries that contain a large number of rows. The two kinds of temporary tables, which are created by different SQL statements, are the created temporary table and the declared temporary table. See also base table, result table, table, declared temporary table, created temporary table.

 temporary table space

A table space that can store only temporary data. See also system temporary table space, user temporary table space.

 temporary-text-delay character (TTD character)

The BSC transmission control character that tells the receiving station that there is a temporary delay in sending the data.

 tenancy

The period of time between a port's winning arbitration in a loop and the return of that port to the monitoring state.

 Tenex C shell (tcsh)

An enhancement of the UNIX C shell (csh) that is compatible with csh.

 TEP

See terminal error program.

 terabit (Tb)

For processor storage, real and virtual storage, and channel volume, 2 to the power of 40 or 1 099 511 627 776 bits. For disk storage capacity and communications volume, 1 000 000 000 000 bits.

 terabyte (TB)

For processor storage, real and virtual storage, and channel volume, 2 to the 40th power or 1 099 511 627 776 bytes. For disk storage capacity and communications volume, 1 000 000 000 000 bytes.

 teraspace

A one terabyte temporary storage area that provides storage that is private to a process.

 term

(1) A string, symbol, or function call contained within a REXX expression.

(2) The smallest part of an expression that can be assigned a value.

 terminal

(1) In a system or communications network, a point at which data can either enter or leave.

(2) The point at which one node in a message flow is connected to another node. Terminals can be connected to control the route that a message takes, dependent on the outcome of the operation that is performed on that message by the node.

(3) In data communication, a device, usually equipped with a keyboard and display device, capable of sending and receiving information.

 terminal abnormal condition line entry (TACLE)

An area containing CICS error information and a copy of the data event control block (DECB) at the time an error occurred on a non-VTAM terminal or line. When an abnormal condition occurs on a non-VTAM terminal or line, terminal control places the terminal out of service and dynamically creates a TACLE, which is chained off the terminal control table line entry (TCTLE) for the terminal or line on which the error occurred.

 terminal adapter

A device that connects a computer to an external digital communications line such as an integrated services digital network (ISDN) line.

 terminal control

In CICS, a facility that handles addressing, and transmission error detection and correction for terminals (displays and printers) associated with the local CICS system. It also handles the intercommunication data queue used by CICS.

 terminal control interface

An interface that allows an application program to send or receive a device-dependent terminal data stream.

 terminal control system (TCS)

A table defining the connections between CICS systems.

 terminal control table (TCT)

(1) CICS control table retained to define non-VTAM terminal networks.

(2) A table describing the terminals and logical units within a CICS network.

 terminal control table line entry (TCTLE)

A control block in the TCT for all non-VTAM terminals on the same line. The TCTLE contains all parameters necessary for processing requests for terminals on the line. For example, there are TCTLLEs for BSAM terminals on CICS Transaction Server and CICS/VSE, and for TCAM terminals on CICS Transaction Server only. The equivalent information for VTAM terminals is in the VTAM request parameter list (RPL).

 terminal control table system entry (TCTSE)

In the TCT, an entry that is generated for each system known to the local CICS system. Using resource definition macro (RDM), the DFHTCT TYPE=SYSTEM macro defining a TCTSE must specify the applid of the remote system in the NETNAME or the SYSIDNT option. Using resource definition online (RDO), the CEDA DEFINE CONNECTION transaction defining a remote system generates a TCTSE, and must specify the applid of the remote system in the NETNAME option.

 terminal control table terminal entry (TCTE, TCTTE)

In the TCT, an entry for each terminal known to CICS. TCTTEs are generated either during system initialization (for terminals predefined by resource definition) or when a terminal is autoinstalled. The TCTTE describes the terminal and addresses the corresponding TCTLE (RPL for VTAM terminals), the active TCA, and TIOAs; it also contains control information relating to terminal control requests issued by the CICS application program.

 terminal control table user area (TCTUA)

An area used to pass information between application programs, but only if the same terminal is associated with the application programs involved.

 terminal device file

See character special file.

 terminal emulation

The capability of a microcomputer or personal computer to operate as if it were a particular type of terminal linked to a processing unit and to access data.

 terminal endpoint identifier (TEI)

A number to identify the endpoint to the ISDN. Normally, assignment of the TEI can be done automatically by the ISDN.

 terminal equipment (TE)

In an ISDN, data terminal equipment (DTE) that provides the function necessary for the operation of the access protocols by the user.

 terminal equipment 1 (TE1)

Data terminal equipment (DTE) with integrated ISDN support. In an ISDN, the System i system is a TE1. See also terminal equipment 2.

 terminal equipment 2 (TE2)

Data terminal equipment (DTE) without an ISDN interface. To communicate with other equipment through an ISDN, this equipment must have the protocol converted to one that can be recognized by the network. For example, a 7820 ISDN terminal adapter may be used. See also terminal equipment 1.

 terminal error block (TEB)

Control block that maintains error information associated with terminals, for use by the CICS terminal error program.

 terminal error program (TEP)

A user-replaceable CICS program used to handle error conditions that can occur when TCAM devices (in CICS Transaction Server) or BTAM terminals (in CICS/VSE) or sequential devices are used. (Node error programs must be used for VTAM-supported devices.) The terminal error program analyzes the cause of the terminal or line error that has been detected by the terminal control program.

 terminal file

The resource in a 3270 service project that contains the information necessary for connecting to the host system during build time. Terminal files are automatically generated when the 3270 terminal service project is created. In the Navigator view, if a terminal file is selected, the 3270 terminal service recorder opens in the editor area.

 terminal identification (TID)

The first 9 characters of a bank identifier code (BIC).

 terminal-initiated transaction routing

Transaction routing that is initiated by a request to start a remote transaction arriving from a terminal. On the basis of an installed resource definition for the transaction and possibly on decisions made in a user-written dynamic transaction routing program, the request is routed to the appropriate remote system. The transaction runs as if the terminal were attached to the transaction-owning system.

 terminal input/output area (TIOA)

Area that is set up by storage control and chained to the terminal control table terminal entry (TCTTE) as needed for terminal input/output operations.

 terminal list table (TLT)

CICS control table that allows terminal, or operator identifications, or both, to be grouped logically. See also supervisory terminal functions.

 Terminal Monitor Program (TMP)

The program that manages a Time Sharing Option (TSO) session.

 terminal operator

The user of an Emulator High-Level Language Application Programming Interface (EHLLAPI) application program.

 terminal-owning region (TOR)

A CICS region which owns most or all of the terminals defined locally. See also application-owning region, data-owning region.

 terminal paging

A set of commands for retrieving pages of an oversize output message in any order.

 terminal-related MSDB

A type of MSDB in which each segment is assigned to and owned by one logical terminal (LTERM), the owner with terminal security may alter or update that segment, and, a segment may be referenced by other than the owner. Terminal-related MSDBs are fixed, which allows changes, or dynamic, which permits segment insertion and deletion.

 terminal response mode

The type of response mode that suspends all input operations from the terminal until the application program has generated the output message. See also line response mode, response mode.

 terminal security

The use of system definition macros and security maintenance utility control statements to authorize a particular logical or physical terminal to issue some or all of the operator commands and to send or receive some or all of the currently defined transactions.

 terminal type (tty)

A generic device driver for a text display. A tty typically performs input and output on a character-by-character basis.

 Terminal User Control Block (TUCB)

A control block containing terminal-specific and user-specific information used for processing messages for display devices such as screen and printers.

 terminate

In SNA products, a request unit that is sent by a logical unit (LU) to its system services control point (SSCP) to cause the SSCP to start a procedure for ending one or more designated LU-LU sessions.

 terminating plug

A part that ends the cable path on a computer system. The terminating plug is attached to the last disk, diskette, or tape unit in a series.

 termination character

A character that defines the end of a telephone data entry.

 termination imminent step

The final step of the three-step condition-handling model. In the termination imminent step, a final chance is provided to handle conditions or to perform cleanup before the thread is terminated. See also condition step, enablement step.

 termination notification

A pending event that is activated when a CICS subsystem successfully connects to WebSphere MQ for z/OS.

 termination phase

(1) The XRF phase in which an IMS shuts down.

(2) The XRF phase in which the XRF complex returns to two separate and independent environments and all XRF activity in the alternate system stops.

 territory

A portion of the POSIX locale that is mapped to the territory code for internal processing by the database manager.

 territory code

A code that is used by the DB2 database manager to preset the default collation order for an SBCS database and to establish monetary, date, time, and numeric formatting that is specific to a country, region, or territory.

 tessellation

The division of a surface into a mesh or network.

 test

(1) In communications, a data link command or response used to perform a basic test of the station-to-station link connection.

(2) A discipline in the software-engineering process whose purpose is to integrate and test the system.

 testability

The ability of target test items to be appropriately tested: if the target item cannot have the required tests implemented against it, it is possibly lacking testability.

 test asset

The information that is used to create, run, and evaluate tests. Test assets include plans, designs, test cases, test logs, and test reports.

 test case

(1) A set of tasks, scripts, or routines that automate the task of testing software.

(2) The inputs, execution conditions, and expected results that are used to evaluate an aspect of a system under test. See also test idea.

 test condition

A statement that, when taken as a whole, may be either true or false, depending on the circumstances existing at the time the expression is evaluated.

 test configuration

(1) A set of characteristics of the system that hosts the system under test. These characteristics affect the conditions for test execution and the evaluation of test results.

(2) A property of the integration test client that is used to specify modules for testing and to control the tests.

 test control (TC)

A signal sent by the data terminal equipment (DTE) to the attached data-circuit terminating equipment (DCE) to signal a testing mode.

 test coverage

A measurement of the extent of testing for a product. This measurement is often a percentage that represents the degree to which a set of tests address the formal specifications specified test cases for a system or component.

 test driver

A software module or application used to invoke a test and, often, provide test data, control and monitor execution, and report test outcomes. A test driver sequences and controls the automated execution of one or more tests.

 test environment

A specific instance of a configuration of hardware and software established for the purpose of conducting tests under known and controlled conditions. See also deployment environment.

 test escape

A fault or defect that is not detected in product testing and is found by a customer.

 test fix

A temporary fix that is supplied to specific customers for testing in response to a reported problem. See also fix pack, interim fix, refresh pack, manufacturing refresh, fix.

 test harness

A series of script files used to enable a DB2 database for use by the DB2 XML Extender. A test harness is optionally created when a DAD file is generated from a relational database to XML mapping. Once enabled, it tests composing XML from data as well as decomposing XML files into relational data.

 test idea

The definition of one aspect of a possible software test that is used to evaluate the benefit of creating that test. Examples of test ideas include inputs, execution conditions, and expected results. See also test case.

 test key

A key added to a telex message to ensure message integrity and authorized delivery. The test key is an integer value of up to 16 digits, calculated manually or by a test-key processing program using the significant information in the message, such as amounts, currency codes, and the message date.

 test-key processing program

A program that automatically calculates and verifies a test key. The Telex Link supports panels for input of test-key-related data and an interface for a test-key processing program.

 test library

A user-defined library used for debugging operations that does not contain objects needed for normal processing. See also production library.

 test mission

See evaluation mission.

 test mode

The mode that causes any input message entered into a terminal under test to be returned to the test terminal, with error analysis procedures bypassed.

 test motivator

The rationale for testing a product.

 test oracle

A mechanism that determines whether a software program passes a test case.

 test pattern

A template used for the automatic generation of component tests. There are several test patterns available for testing both Java and EJB components. See also component test.

 test plan

A set of test cases that defines an area of testing.

 test requirement

See test idea.

 test script

A collection of step-by-step instructions that realize a test, enabling its execution. Test scripts may take the form of either documented textual instructions that are executed manually or computer readable instructions that enable automated test execution.

 test suite

A collection of test cases that define test behavior and control test execution and deployment.

 test value

A value used to compare for a specified condition.

 text

A sequence of characters that can be read by a person and encoded into formats such as ASCII that can be interpreted by a computer.

 text analysis

The process of extracting semantics and other information from text to enhance the retrievability of data in a collection. See also semantic search.

 text analysis engine (TAE)

A software component that is responsible for discovering and representing context and semantic content in text. See also Common Analysis Structure.

 text attribute

In the GDDM function, characteristics of chart information, such as the color or type style.

 text-based scoring

The process of assigning an integer value to a document that signifies the relevance of the document with respect to the terms in a query. A higher integer value signifies a closer match to the query. See also dynamic ranking, static ranking.

 text box

A box within a dialog box into which a user can type information. The text box may be empty or may contain default information when the dialog box first appears.

 text control

Structured field data that control the format, placement, and appearance of text.

 text control sequence

A text control and its associated data.

 text correction

A substitution method that uses lexical analysis and dictionary support to propose candidates for corrected text, for example: spelling suggestion, search query resolution, and thesaurus lookup.

 text editor

A program used to create, modify, and print or display text files.

 text file

A file that contains only printable characters. See also binary file.

 text index

In DB2 Net Search Extender, a collection of significant terms extracted from text documents. Each term is associated with the document from which it was extracted.

 text index entry

An entry for a document in the text search index database. The text index entry is used by the system to locate documents when doing a text search.

 text orientation

A description of the appearance of text as a combination of print direction and character rotation.

 text search index

In DB2 Text Search, a collection of significant terms extracted from text documents. Each term is associated with the document from which it was extracted.

 text search index database

The database files used by text search services for storing the significant words of documents. These database files are used when a user requests a search of the document library for one or more phrases.

 text search services

The system support that lets office users add, delete, and search for documents in the text search index database.

 text segmentation

 text stream

In the C language, an ordered sequence of characters where each sequence or line is ended with a new line control sequence and consists of zero or more characters.

 text suppression

The intentional omission of portions of text in copy groups specified in the form definition.

 text-to-speech (TTS)

The process by which ASCII text data is converted into synthesized speech.

 text transparency

In binary synchronous communication (BSC), a method of sending and receiving data containing any or all of the 256 character combinations in EBCDIC in specific bit patterns, including transmission control characters.

 textual data

The collective term for menus, displays, lists, prompts, options, online help information, and messages.

 textUI program

A type of EGL program part that interacts with the user by way of a character-based display. The display appears in a 3270 screen or a command window, not in a Web browser.

 TFS

See temporary file system.

 TFTP

See Trivial File Transfer Protocol.

 TG

See transmission group.

 TGS

See ticket-granting service.

 TGT

(1) See ticket-granting ticket.

(2) See task global table.

 TG vector

A representation of an endpoint transmission group (TG) in a T2.1 network, consisting of two control vectors: the TG Descriptor (X'46') control vector and the TG Characteristics (X'47') control vector.

 TH

See transmission header.

 theme

(1) The style element that gives a place a particular look. The portal provides several themes, similar to virtual wallpaper, from which you can choose when creating a place.

(2) A collective set of style sheets that supports the look and feel of the Rational Asset Manager Web client.

 theme extraction

A type of concept extraction that automatically recognizes significant vocabulary items in text documents to extract the theme or topic of a document. See also concept extraction.

 thin application client

A lightweight, downloadable Java application run time capable of interacting with enterprise beans.

 thin client

A client that has little or no installed software but has access to software that is managed and delivered by network servers that are attached to it. A thin client is an alternative to a full-function client such as a workstation. See also rich client.

 Thin Console

An appliance that provides a 5250-based operating system console for the i5/OS operating system. This appliance connects directly to the server using one of the HMC Ethernet ports (labeled HMC 1 and HMC 2) on the back of the server.

 third generation (3G)

The next generation of wireless technology. Multimedia 3G networks transmit wireless data up to 2 megabits per second, making possible the integration of voice, data and video.

 third-generation language (3GL)

A high-level programming language that was designed to run on the third generation of computer processors, built on integrated circuit technology roughly from 1965 to 1970. C, FORTRAN, Basic and Pascal are examples of third-generation languages still in use today.

 third party

A company that manufactures and sells applications for use with a major manufacturer's computer or peripherals, usually without any involvement from the major manufacturer.

 third-party plug-in

In System i Navigator, the support that allows users to install software from different vendors.

 thlqual

See target library high-level qualifier.

 thousands of power-on hours (KPOH)

A unit of time used to measure the mean time between failures (MTBF).

 thousands separator

The character (comma in the United States) placed every third number starting left of the decimal point. For example, three thousands separators are used in the number: 641,322,974,821.

 thread

(1) The DB2 structure that describes an application's connection, traces its progress, processes resource functions, and delimits its accessibility to DB2 resources and services. Most DB2 functions execute under a thread structure.

(2) A stream of computer instructions that is in control of a process. In some operating systems, a thread is the smallest unit of operation in a process. Several threads can run concurrently, performing different jobs.

(3) The messages or documents that capture a written conversation about a topic. In Notes, a thread consists of an initial mail message or document and all its replies, contained in a view or displayed as a history in a document.

 thread-capable

Pertaining to the ability to create threads.

 thread contention

A condition in which a thread is waiting for a lock or object that another thread holds.

 thread handle

In DCE Remote Procedure Call (RPC), a data item that enables threads to share a storage management environment.

 thread ID

The unique integral number that can be used to identify a thread. Thread ID is sometimes used to describe the pthread_t data type that represents the abstraction to a thread.

 threading

The process whereby various transactions undergo concurrent execution.

 thread local storage (TLS)

(1) See thread-specific storage.

(2) A mechanism that allows each thread in a multithread process to allocate storage for its corresponding data.

 thread private storage

See thread-specific storage.

 threadsafe

Pertaining to a function, macro, or operating system service that can be called from multiple threads in a process at the same time. See also thread unsafe, reentrant code.

 thread-specific storage

Storage that is not shared among threads, but can be accessed by all functions within that thread.

 thread synchronization

The ability to synchronize the activities of various threads. A thread synchronizes itself with another thread by putting itself to sleep. Before doing so, the thread notifies the operating system as to what event has to occur in order for the thread to resume execution.

 thread unsafe

A thread that cannot be called from multiple threads. See also threadsafe.

 three-part name

The full name of a table, view, or alias that consists of a location name, an authorization identifier, and an object name, separated by periods.

 threshold

(1) A level set in the system at which a message is sent or an error-handling program is called. For example, in a user auxiliary storage pool, the user can set the threshold level in the system values, and the system notifies the system operator when that level is reached.

(2) In OSI, a user-specified value that determines the frequency with which events will be reported. For example, if a certain error threshold is set at 10, the error will not be reported until the tenth occurrence of the error.

(3) A customizable value for defining the acceptable tolerance limits (maximum, minimum, or reference limit) for an application resource or system resource. When the measured value of the resource is greater than the maximum value, less than the minimum value, or equal to the reference value, an exception or event is raised. See also performance threshold.

(4) A setting that applies to an interrupt in a simulation that defines when a process simulation should be halted based on a condition existing for a specified proportion of occurrences of some event.

(5) A storage group attribute that controls the space usage on direct access storage device (DASD) volumes, which is defined as a percentage of occupied tracks versus total tracks.

(6) A user-defined entity that establishes a condition or boundary that, if exceeded, causes the data server to take a prescribed set of actions. See also workload definition.

 threshold analysis

In Backup, Recovery, and Media Services, the comparison of actual media statistics to standard industry statistics for that media.

 threshold definition domain

The object that a threshold is associated with and whose activities are monitored to ensure that the threshold condition is not exceeded. A threshold affects only activities within its domain.

 threshold enforcement scope

The area for which a threshold is both monitored and enforced for activities to which the threshold has been applied. Examples of this area include a workload occurrence, a database partition, or a database.

 threshold event

In OSI, an event that occurs when a counter has reached its user-specified threshold. OSI Communications Subsystem logs threshold events and generates messages to the operator about these events.

 threshold value

In the capacity planning tool, a value used as a general guide for optimal resource utilization. If resource utilization is above the threshold value, the resource performance may be unacceptable. Threshold values are also available for the rate of synchronous reads in the machine pool and for the sum of all pools. See also guideline value.

 throttle

(1) A condition defined in the filter table and used to regulate the flow of traps.

(2) The act of cutting off or reducing input or output.

 throttled utility

A utility that has a limit placed on the resources that would otherwise be consumed. The degree to which the resources are limited is based on the current workload of the system. Supported utilities include backup, restore, and table space reorganization.

 throughput

(1) The measure of the amount of work performed by a device, such as a computer or printer, over a period of time, for example, number of jobs per day.

(2) In data communications, the total traffic between stations over a period of time.

(3) A measure of the amount of information transmitted over a network in a given period of time. It is generally measured in bits per second (bps), kilobits per second (Kbps), or megabits per second (Mbps). See also aggregate bandwidth.

 throughput class

In packet switching, the speed at which data terminal equipment (DTE) packets travel through the packet switching network.

 throughput class negotiation

(1) In X.25, a packet-switching data network optional facility that allows the data terminal equipment (DTE) to negotiate the speed at which its packets travel through the packet-switching data network.

(2) In OSI, a network layer facility that selects the speed with which data transmission requests are to be handled.

 throughput rate

The data processing work successfully completed per unit of time.

 throw

In programming languages, to pass an error or exception to a handling routine.

 thumbnail

An icon-sized rendering of a larger graphic image that permits a user to preview the image without opening a viewer or graphical editor.

 thunking

In System i Access, the process that occurs when a 32-bit application calls a 32-bit application programming interface that is implemented by a 16-bit component of the system.

 TIC

See trunk interface card.

 tick

In Business Graphics Utility, a reference point on either the vertical or horizontal axis of some chart types that represents the location of specified data values.

 ticket

A mechanism for securely transmitting the identity of a client to a server.

 ticket-granting server

A part of the key distribution center (KDC) that generates service tickets. A principal presents a ticket-granting ticket to the ticket-granting server when the principal requests a service ticket. The ticket-granting server uses the ticket-granting ticket to verify that the principal has authenticated to the authentication server before it grants the request for a service ticket.

 ticket-granting service (TGS)

A service provided by the key distribution center (KDC) that issues service tickets.

 ticket-granting ticket (TGT)

(1) A ticket that a principal passes to the ticket-granting server when a service ticket is requested. The ticket-granting service uses the ticket-granting ticket to verify that the principal has authenticated to the authentication server before it grants the request for the service ticket.

(2) A ticket that allows access to the ticket granting service on the key distribution center (KDC). Ticket granting tickets are passed to the principal by the KDC after the principal has completed a successful request. In a Windows 2000 environment, a user logs on to the network and the KDC will verify the principal's name and encrypted password and then send a ticket granting ticket to the user.

 TID (XID)

(1) See transaction identifier.

(2) See terminal identification.

 TIE

See technical information exchange.

 tier

A group of servers that share a function in an application.

 tiered SLA

A service level agreement (SLA) that includes an offering containing at least one previously deployed SLA. They can be used to include the results of operational level agreements, internal SLAs or outsourced SLAs, in an external SLA that are supplied to a customer.

 tie-up record (TUR)

In the CICS backup while open (BWO) facility, a record in the forward recovery journal that associates a file name with a data set name.

 TIFF

See Tagged Image File Format.

 TIFF-F

See Tag Image File Format-Fax.

 tight loop

A loop in a single program that never returns control to the program or operating system.

 tightly coupled multiprocessing

A type of processing in which two computing systems operate simultaneously under one control program while sharing resources.

 tilde

One of the accent marks in Latin script (~).

 time

A three-part value that designates a time of day in hours, minutes, and seconds.

 time-based update detection

A means of determining when rows were last updated, using the ROW CHANGE TIMESTAMP expression.

 time code

A codes that is used to classify reported time.

 time differential factor (TDF)

In the DCE Distributed Time Service (DTS), the difference between coordinated universal time (UTC) and the time in a particular time zone.

 Time Division Multiple Access (TDMA)

A digital communication technology used by some carriers to provide PCS service. TDMA is a multiplexing technology used with satellites and cell phones, in which multiple channels of data are interleaved (each signal is assigned to a different time interval, and the signals are transmitted by taking turns). See also extended time division multiple access.

 time-division multiplex bus

A method of transmitting many channels of data over a smaller number of physical connections by multiplexing the data into timeslots, and demultiplexing at the receiving end. In this document one such channel can be considered to be a half-duplex unidirectional stream of 64 kilobits per second.

 timed payment

A payment that is to be scheduled before its schedule time. This capability is used by Continuous Linked Settlement (CLS). In MERVA Liquidity Manager, timed payments are scheduled even if the corresponding currency, channel, or partner banks are stopped.

 time duration

A DECIMAL (6,0) value that represents a number of hours, minutes, and seconds.

 time event

An event that denotes the time elapsed since the current state was entered.

 time expression

An expression that resolves to an absolute or relative value of time.

 time-independent messaging

See asynchronous messaging.

 timemark

A specific period of time that is allowed by the Telnet server to verify that a connection is still active.

 Time-Modulated Ultra-Wide Band (TM-UWB)

New wireless technology that greatly broadens bandwidth. Developed by Time Domain, TM-UWB uses short, coded pulses transmitted over a wide range of frequencies, making it useful for a broad range of applications from networking to through-the-wall radar and secure communications.

 time-of-day clock (TOD clock)

A timing device that counts units of time based on the starting point of 00 hours, 00 minutes, and 00 seconds on January 1, 1900. Time-of-day (TOD) information is used to monitor computer operations and events. See also time tolerance.

 timeout

(1) A time interval that is allotted for an event to occur or complete before operation is interrupted.

(2) An event that occurs at the end of a predetermined period of time that began at the occurrence of another specified event.

(3) Abnormal termination of either an application or the DB2 for z/OS subsystem because of the unavailability of resources.

 time provider (TP)

In the DCE Distributed Time Service (DTS), a process that queries coordinated universal time (UTC) from a hardware device and provides it to the server.

 time provider interface (TPI)

In the DCE Distributed Time Service (DTS), an interface between the DTS server and external time provider process.

 timer

(1) A BTS object that expires when the system time becomes greater than a specified time, or after a specified period has elapsed.When you define a timer, a timer event is automatically associated with it. When the timer expires, its associated event fires.

(2) A task that produces output at certain points in time.

 timer domain

Major component of CICS that provides interval timing and alarm clock services for CICS domains. These are processes that cause an action to occur at some predetermined future time. This service can be performed after a specific interval, at periodic intervals, at a specified time of day, or at a specific time of day every day. It also provides date and time provision and conversion facilities.

 timer event

An atomic event that fires when its associated timer expires. See also user-defined event.

 timeron

A unit of measurement used to give a rough relative estimate of the resources required, or the cost, for the database server to execute two plans for the same query. The resources calculated in the estimate include weighted processor and I/O costs.

 timer-related event

A CICS interval control function that is used to support events that are delayed, suspended, or restarted after a time interval.

 time sharing

Sharing computer time and resources.

 Time Sharing Option (TSO)

A base element of the z/OS operating system with which users can interactively work with the system. See also Interactive System Productivity Facility.

 Time Sharing Option Extensions (TSO/E)

A licensed program that is based on Time Sharing Option (TSO). With TSO/E, MVS users can interactively share computer time and resources.

 Time Sharing Option single point of control (TSO SPOC)

An IBM-supplied application from which a user can manage operations of all IMS systems within an IMSplex.

 time slice

The amount of processor time (specified in milliseconds) allowed for a job before other waiting jobs of equal priority are allowed to process data.

 time slicing

A mechanism that preempts running threads at fixed intervals. This ensures th