Symbols and Numerics

/Etc/exports file
In Network File System, a restricted file that contains a list of options for exported file systems and associated access authorities.

100% Pure Java
A Sun Microsystems initiative to guide developers in writing, certifying, and marketing of applications.

1024-byte format
A format for diskette 2D diskettes with 1024 bytes per sector and 8 sectors per track.

12-hour clock
A clock that keeps time from 12:00 a.m. (midnight) to 12:00 p.m. (noon), and from 12:00 p.m. (noon) to 12:00 a.m. (midnight). Compare with 24-hour clock.

128-byte format
A format for diskette 1 diskettes with 128 bytes per sector and 26 sectors per track.

1980 X.25 call
A call that conforms to the 1980 X.25 protocol specifications.

1984 X.25 call
A call that conforms to the 1984 X.25 protocol specifications.

1988 X.25 call
A call that conforms to the 1988 X.25 protocol specifications.

24-hour clock
A clock that keeps time from 0000 (midnight) to 1200 (noon), and from 1200 (noon) to 2400 (midnight). Compare with 12-hour clock.

256-byte format
A format for diskette 2D diskettes with 256 bytes per sector and 26 sectors per track.

3GL
Third generation languages, such as COBOL, C, and RPG.

3-state check box
A square box with associated text that represents a choice. Unlike a regular check box, which has only two states (selected and deselected), a 3-state check box has three states (selected, deselected, and unavailable). The unavailable state is displayed as a halftone and denotes that the 3-state check box cannot be selected.

3164 ASCII Color Display Station
A general purpose asynchronous ASCII/ISO display station that is designed to attach to both IBM and non-IBM systems.

3180 display station
A display station that uses the 5250 data stream.

3270 attention field
A field on a display screen that contains a null, a space, or an ampersand in the first position. The field can be selected using the Cursor Select key, which causes data to be sent to the host system.

3270 device emulation
The operating system support that allows an AS/400 system to appear as a 3274 Control Unit in a BSC multipoint network or an SNA network. See also 3270 display emulation and 3270 printer emulation.

3270 display emulation
The function of the operating system 3270 device emulation support that converts 3270 data streams intended for a 3278 display station into data streams that can be recognized by a display station attached to the AS/400 system.

3270 display station
Any display station, attached by coaxial cable, that uses 3270 data streams.

3270 printer emulation
The function of the operating system 3270 device emulation support that converts 3270, DSC, and SCS data streams intended for a 328X printer into data streams that can be recognized by a printer attached to the AS/400 system.

400/REXX
See REXX/400.

512-byte format
A format for diskette 1 diskettes with 512 bytes per sector and 8 sectors per track.

5208 Link Protocol Converter
A device that attaches asynchronous-attached work stations using ASCII encoding to the system as if they were 5250 work stations. Compare with 5209 Link Protocol Converter.

5209 Link Protocol Converter
A device that attaches 327x work stations to the system as if they were 5250 work stations. Compare with 5208 Link Protocol Converter.

5250 display station
Any display station, attached by twinaxial cable, that uses 5250 data streams.

5250 emulation
Any one of many licensed programs that allow a personal computer to perform like a 5250 display station or printer and to use the functions of an AS/400 system.

5250 Work Station Feature
A feature of OS/2 Extended Edition Communications Manager that allows the personal computer to perform like a 5250 display station and use the functions of an AS/400 system, System/36, or System/38. See also work station function (WSF).

5290 display station
Any display station from the 5290 Display System.

5294 Remote Control Unit
A control unit that attaches up to eight 5250 display stations and printers.

5394 Remote Control Unit
A control unit that attaches up to sixteen 5250 display stations and printers.

5494 Remote Control Unit
A control unit that can attach up to 56 work stations and allows either twinaxial or token-ring attachment.

6091
An IBM color monitor that supports high resolution color.

80286 processor
A microprocessor chip used in some models of the personal computer. For example, PS/2 Models 30-286, 50, 50Z, and 60 systems.

80386 processor
A microprocessor chip used in some models of the personal computer to allow a user to access extended memory. For example, PS/2 Models 70, P70, and 80 systems.

80387
A microprocessor chip that performs floating-point computations. It can be optionally installed on the system board of the Personal System/2 (PS/2) system.

8514
An IBM color monitor for the Personal System/2 (PS/2) system.


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