Appendix
D.
Glossary
This glossary includes terms and definitions from
the
IBM
Vocabulary for Data Processing,
Telecommunications, and
Office Systems,
GC20-1699.
A.
Ampere.
ac. Alternating current.
ACR. Abandon call and retry.
alter. To change something. Same as
modify.
ALTERCOM. Alter communications
(configuration procedure).
See
also
SETCOMM.
alternative cylinder. A cylinder on a diskette that
is
used by the system when the selected cylinder
cannot be used.
alternative sector. A sector on a disk that
is
used
by the system when the selected sector cannot be
used.
APAR. Authorized program analysis report.
assistance. Aid.
See
also
RETAIN.
Attn. Attention (key).
authorized program analysis report. A request for
correction
of
a problem caused by a defect in the
present release
of
a program.
auto. Automatic.
backup. Pertaining to a system, device, or
file
that
can be used in the event
of
a failure or loss
of
data.
See
backup copy, backup diskette,
and
switched
network backup
(SNBU).
backup copy. A copy
of
a
file
or
data set
that
is
kept for reference in the event the original
file
or
data set
is
destroyed.
See
also backup diskette.
backup diskette. A diskette that contains
information that was copied from a diskette or
from disk. The backup diskette
is
used in the event
the original information
is
accidentally altered or
destroyed.
See
also backup copy.
batch. A group
of
records or jobs
put
together for
processing or transmission.
binary synchronous communications. A type
of
line
control with a set
of
rules for transmitting data
over a communications line connecting two devices
that use a communications adapter.
BSC. Binary synchronous communications.
BSCTEST.
BSC
online test (procedure).
See
also
COMMTEST,
SDLCTEST,
and
ST
A TEST.
call.
(1)
A service call.
(2)
To activate a program
or procedure
at
its entry point. (3)
In
data
communications, the action performed by the
calling person
or
station, or the operations
necessary in making a call, or the effective use
made
of
a connection between two stations.
call request. To request a call.
See
also call.
called station. On a switched line, in data
communications, the location to which a connection
is
made.
calling station.
On a switched line, in data
communications, the location making a connection.
CCITT. The International Telephone
and
Telegraph Consultative Committee.
CE cylinder. An area on disk that
is
used as a
read/write area for diagnostic testing.
CE
track.
See
CE
cylinder.
CEB. Channel error byte.
clocking. In data communications, the use
of
clock
pulses to control synchronization
of
data
and
control characters.
Cmd. Command (key).
CNTLCOMM. Control communications
(procedure).
COMCNFIG. Communications configuration.
COMM. Communications.
Appendix
D. Glossary
D-l
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