TABLE OF CONTENTS | A | anode; angstrom; area of pipe; area; acceleration (in general); ampere. | |
| a | ampere and area. | |
| A/D | analog/digital. | |
| A/M | auto/manual switch. | |
| AA | arithmetical average; Aluminum Association. | |
| ABI | application binary interface. | |
| ABS | acrylonitrile butadiene styrene. | |
| AC (or ac) | alternating current. | |
| Ac | actinium. | |
| ACE | Advanced Computing Environment initiative. Also known as asynchronous communications elements. | |
| ACF | actual cubic feet. | |
| ACK | acknowledge. | |
| ACPDP | alternating current plasma display panel. | |
| ACR | automatic cartridge recorder. Also known as attenuation-to-crosstalk ratio (of signal cable). | |
| ACSE | association control service element. | |
| ACT | acoustic charge transport. | |
| ACTFEL | alternating-current thin-film electroluminescent. See electroluminescent displays. | |
| ACU | automatic calling unit. | |
| ADC | analog-to-digital converter. | |
| ADCCP | Advanced Data Communications Control Procedure. | |
| ADLC | advanced data link control. | |
| ADO | Ampex Digital Optical. | |
| ADP | ammonium dihydrogen phosphate. | |
| ADPCM | adaptive differential pulse code modulation. | |
| ADS | address data strobe. | |
| ADSL | asymmetric digital subscriber line. | |
| AE | application entity. Also known as architectural engineer; application enabler. | |
| A&E | Architecture and Engineering. | |
| AEB | Australian Electrotechnical Board. | |
| AECMA | Association Europ enne des Constructeurs de Mat riel A rospatial (also known as the European Association of Aerospace Industries). | |
| AENOR | Asociaci n Espa ola de Normalizaci n y Certificaci n. | |
| AFAN | advanced factory automation network. | |
| AFC | automatic frequency control. | |
| AFIPS | American Federation of Information Processing Societies (Inc.). | |
| AFM | abrasive flow machinery; audio frequency modulated. | |
| AFMDC | Air Force Machinability Data Center. | |
| AFNOR | Association Fran aise de Normalisation. | |
| Ag |
