| Abbreviation | Definition |
|---|---|
| AICS | Advanced Internet Connectivity Solution |
| AIDC | ATS (Air Traffic Services) Interfacility Data Communications |
| AIEPM | Active Internet End-to-end Performance Measurement |
| AINA | Advance Information Networking and Applications |
| AIP | Application Infrastructure Provider |
| AIP | ATM Interface Processor |
| AIS | Application Integration Suite |
| AKA | Authentication and Key Agreement |
| AL | Adaptation Layer |
| AL | Arbitrated Loop |
| ALF | Access Layer Format |
| ALF | Application-Level Framing |
| ALG | Application Layer Gateway |
| ALLF | Additional Low Layer Function |
| ALNA | Airline Network Architecture |
| ALNET | Algorithms and Networks |
| ALOHA | Abramson's Logic of Hiring Access |
| ALSA | Advanced Linux Sound Architecture |
| ALU | Analog Looping Utility |
| ALU | Audio, LAN, and USB |