SNAX/APN Application Programming Manual

SNAX/APN Application Programming Manual—420111-001
Glossary-1
Glossary
This glossary defines terms used in this manual. Several definitions are taken from the
IBM Dictionary of Computing and the IBM Network Program Products: General
Information. Please refer to these IBM manuals for IBM terms not included in this
glossary.
acquire. The means by which a Tandem application initiates and establishes a session with a
logical unit in another domain.
ADD command. A Subsystem Control Facility (SCF) command that defines an object to a
subsystem.
advanced peer-to-peer networking (APPN). An extension of SNA featuring greater
distributed network control that avoids critical hierarchical dependencies, thereby
isolating the effects of single points of failure. APPN extends the LU 6.2 peer
orientation for end-user services to network control.
advanced program-to-program communication (APPC). An implementation of the
SNA/SDLC LU 6.2 protocol that allows interconnected systems to communicate and
share the processing of programs.
AID. See attention identifier (AID) character
.
American Standard Code for Information Interchange (ASCII). A method of coding
data, consisting of 7 bits for each character, plus a parity bit. Designed for synchronous
or asynchronous use, the code has 128 standard characters.
API. See application program interface (API)
.
APPC. See advanced program-to-program communication (APPC)
.
application. See application process
.
application process. A software program written for or by a user to fulfill a specific purpose.
application program interface (API). (1) A mechanism by which an application program
interfaces with another piece of software that normally provides services to the
application. (2) A set of procedure calls that provides a workstation application with a
standard interface for communicating with a Tandem system.
APPN. See advanced peer-to-peer networking (APPN)
.
ASCII. See American Standard Code for Information Interchange (ASCII)
.
attention identifier (AID) character. A character inserted at the beginning of an incoming
3270 data stream that identifies which key (A1 through A15) on the display terminal was
pressed, causing the transmission of screen data.