APPENDIX I
GLOSSARY OF TERMS AND ACRONYMS
2M— Miniature/Microminiature (2M) Electronic
Repair.
A/D— Analog-to-digital.
AAC— Analog-to-analog converter.
ABORT— To end the execution of a program before
is it completed because of an irrecoverable
error, mistake, or malfunction.
ABT— Automatic bus transfer.
ac— Alternate current.
ACO SWITCHING— Action cutout switching.
ADDRESS— A character or group of characters
that defines a particular part of storage,
some other data source, or destination. Nor-
mally the location of a given storage cell in a
memory.
ADDRESS BUS— A bus carrying signals that define
storage addresses.
ADP— Automated data processing.
ALGORITHM— The series of steps to solve a
problem.
ALS— Advanced low-power Schottky.
Alt— Alternate.
ALU— Arithmetic logic unit.
amp— Amplifier.
ANEW— Army-Navy Electronic Warfare.
ANSI— American National Standards Institute.
AS— Advanced Schottky.
ASCII (American Standard Code for Information
Interchange)— A standard 8-bit code for use with
computers and data terminals.
ASR— Active status register.
ASW— Antisubmarine warfare.
ASW SYSTEMS— Antisubmarine warfare systems.
ASWOC— Antisubmarine Warfare Operations Cen-
ter.
ASWOC/HLT— Antisubmarine Warfare Operations
Center/High-Level Terminal.
Async— Asynchronous.
AZIMUTH— An angular measurement in the hor-
izontal plane in a clockwise direction.
BAM— Binary angular movement or motion.
BAP— Buffer address pointer.
BASIC— Beginner’s All-purpose Symbolic Instruction
Code.
BBC— MTC CABLE-Buffered block channel/mag-
netic tape controller cable.
BBU— Battery back-up unit.
BCD— Binary-coded decimal.
BCH— Binary-coded hexadecimal.
BCO— Binary-coded octal.
BCW— Buffer control word.
BEARING— An angular measurement of the direc-
tion of an object from a reference direction,
such as true north.
AI-1
