| A4O | označenie lietadiel Ománu, Omán (označenie lietadiel) |
|---|---|
| AAD | Automatic Activation Device |
| AAE | automatic answering equipment (skr.) |
| AAF | Audit Automation Facilities |
| ABE | Automated Buyer Environment |
| ABM | Automatic Building Machine |
| ABO | somálske sídlo |
| ABS | Automated Billing System |
| ABS | Automatic Backup System |
| ABS | Automatic Beam System |