| A | B |
|---|
| AC | Alternating current |
| ACPI | Advanced configuration and power interface |
| ACT | Activity |
| ADSL | Asymmetrical digital subscriber line |
| AGP | Accelerated graphics port |
| AMD | Advanced micro devices |
| AMR | Audio modem riser |
| APIPA | Automatic private internet protocol addressing |
| ARP | Address resolution protocol |
| ASR | Automated system recovery |
| AT | Advanced technology |
| ATA | Advanced technology attachment |
| ATAPI | Advanced technology attachment packet interface |
| ATM | Asynchronous transfer mode |
| ATX | Advanced technology extended |
| BIOS | Basic input/output system |
| BNC | Bayonet-Neill-Concelman or British Navel Connector |
| BRI | Basic rate interface |
| BTX | Balanced technology extended |
| CD | Compact disc |
