SNAX/XF LU Network Services Manual

Glossary
097841 Tandem Computers Incorporated Glossary–1
This glossary defines terms used in the SNAX/XF LU Network Services Manual. For
abbreviations of terms specific to SNAX/XF and Tandem products, the definition
consists of a cross-reference to the spelled-out term.
In addition, several definitions have been taken from the IBM Dictionary of Computing
and the IBM Network Program Products: General Information manual. For most IBM
SNA abbreviations in this glossary, only the spelling of the abbreviation is given; refer
to the IBM manuals noted above for more information about IBM terms.
abend. Abnormal termination or abnormal end of task.
ACTLU. Activate logical unit.
APPL object type. A Tandem object type that defines an object as an application logical
unit.
application program. A software program written for or by a user to fulfill a specific
purpose.
APC. See SNAX/APC.
ASCII. American National Standard Code for Information Interchange. An 8-bit code
representing characters and control codes. One of two major codes used to represent
and exchange data. See also EBCDIC.
BIND. An SNA command that establishes a session between two logical units.
BIND image. A description of session parameters passed by the SSCP to the PLU.
BIND table. A table containing one or more BIND images.
BIU. Basic information unit.
block mode. A mode of operation in which computer programs and devices exchange
data in quantities greater than the line size of the particular device.
boundary function. The functionality of a subarea node that provides for the support of
locally attached peripheral nodes.
character set. A defined collection of character representations valid for a particular
program, printer, or language. Characters may be stored in ASCII or EBCDIC, and
may be displayed on-screen or printed in a variety of languages. In SNAX/XF or
other codes, characters must be stored in EBCDIC to implement National Character
Support.
CICS. Customer Information Control System.
CINIT. Control initiate, an SNA request.
cluster controller. A device that controls access to a group of terminals or printers.
command file. A file that serves as a source for command input.