| A | B |
|---|
| ACL | Access Control List |
| AD | Active Directory |
| ADSL | Asymmetric Digital Subscriber Line |
| AFP | Apple File Protocol |
| AH | Authentication Header |
| AM | Amplitude Modulation |
| AMI | Alternate Mark Inversion |
| APIPA | Automatic Private Internet Protocol Addressing |
| ARP | Address Resolution Protocol |
| ATM | Asynchronous Transfer Mode |
| AV | Anti-Virus |
| BDC | Backup Domain Controller |
| BERT | Bit-Error Rate Test |
| BIND | Berkeley Internet Name Domain |
| BNC | British Naval Connector / Bayonet Niell-Concelman |
| BootP | Boot Protocol / Bootstrap Protocol |
| BRI | Basic Rate Interface |
| BSD | Berkeley Software Distribution |
| CDFS | CD-ROM File System |
| CHAP | Challenge Handshake Authentication Protocol |
