| Abbreviation | Definition |
|---|---|
| ADD | AGP (Accelerated Graphics Port) Digital Display |
| ADDA | Analog Digital Digital Analog |
| ADDR | Analog Digital Data Recorder |
| ADE | Absolute Digital Encoder |
| ADF | Alternate Delivery Format |
| ADF | Automatic Document Feeder |
| ADFS | Advanced Disc Filing System |
| ADM | Analog Dynamic Memory |
| ADP | Active Distribution Panel |
| ADP | Automatic Data Processing |
| ADPTR | Adaptor |
| ADSM | Adstar Distributed Storage Management |
| ADTM | Apollo Desktop Teleconferencing Module |
| ADU | Analog-to-Digital Unit |
| ADU | Automatic Duplex Unit |
| ADV | Almost Dead Video |
| ADVC | Analog to Digital Video Converter |
| AEC | Automatic Emulation Change |
| AEM | Adobe Experience Manager |
| AEMS | Advanced Environmental Monitoring System |