| Acronym | Meaning |
| FIR | Final Inspection Report |
| GCF | Greatest Common Factor |
| R&S | Reconnaissance & Surveillance |
| PH | Passive Homing (missile Guidance System) -petahenry - Philippines (ISO 3166 Digram) -Probability Of Hit - Public Health - Purple Heart |
| YG | Yoctogram |
| AX | land Islands (ISO 3166 Digram) |
| MOFA | Ministry Of Foreign Affairs (Japan) |
| RDECOM | (U.S.) Research |
| ATI | Allied Telesyn International |
| BCD | Binary-Coded Decimal |