Appendix I Glossary

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