| Acronym | Meaning |
| A | Atto |
| JUGFET | JUnction Gate Field-Effect Transistor |
| CDA | UK Centre For Defence Analysis |
| HUD | Head-Up Display - Housing And Urban Development |
| QAT | Qatar (ISO 3166 Trigram) |
| ACTD | Advanced Concept Technology Demonstration |
| J | Joule |
| AFL | American Federation Of Labor - American Football League - Arena Football League - Australian Football League |
| BDU | Battle-Dress Uniform |
| PAHO | Pan American Health Organization |