| Acronym | Meaning |
 | IF | Intermediate Frequency |
| USDA | United States Department Of Agriculture |
| APS | American Physical Society |
| BIT | Binary Digit (either 0 Or 1) |
| LRU | Line Replaceable Unit |
| BPI | Bits Per Inch |
| AORD | Astronaut Operations Requirements Document |
| NM | Network Management |
| (A3) | Armor/anti-armor |
| OIRTD | Office Of Industrial Relations And Technology Development |
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