SNAX/APC Management Programming Manual

Glossary
111813 Tandem Computers Incorporated Glossary–1
This glossary includes several definitions taken from the IBM Dictionary of Computing,
IBM Network Program Products: General Information, VTAM Programming for LU 6.2, and
SNA Type 2.1 Node Reference. Please refer to these IBM manuals for IBM terms not
included in this glossary.
access method. An I/O process that allows applications running on a NonStop system
to communicate with other systems or devices. More generally, a protocol that
provides for orderly access, by systems and devices, to a communications medium.
advanced peer-to-peer networking (APPN). An extension of SNA that avoids dependence
on hierarchical relationships and eliminates the need for the intervention of an SSCP
for session initiation.
advanced program-to-program communication (APPC). Communication between programs
using SNA LU 6.2 protocol.
APCRUN. A TACL macro that establishes a sample PATHWAY environment to
support the application prototype simulator system.
APCTAP. See SNAX/APC Trace Analysis Program.
API. See application programming interface.
APPC. See advanced program-to-program communication.
application programming interface (API). The means by which a program gains access to a
set of related services; for example, SNAX/APC or SNAX/HLS.
application prototype simulator (APS) system. A SNAX/APC tool used by software
developers to prototype and test application programs that use SNAX/APC.
APPN. See advanced peer-to-peer networking.
APPN network. An SNA network implementing advanced peer-to-peer networking.
APS. See application prototype simulator system.
ATP. Application transaction program.
attribute. An identifiable characteristic of an object.
backup CPU. The central processing unit (CPU) number of the Tandem processor on
which the backup process will run. See backup process.
backup process. In a Tandem NonStop system, a process that is identical to the primary
process and is created at the same time as the primary process. These two processes
act as a NonStop process pair. The backup process takes over if the primary process
fails. See primary process.
basic conversation. In the LU 6.2 architecture, a conversation in which the application
programs package the data in the form of GDS variables and format the required GDS
headers. A receiving program must interpret the GDS header information and extract
the application data from the GDS variables. Contrast with mapped conversation.
basic conversation verbs. Verbs that an application program uses to implement basic
conversations.