| Acronym | Meaning |
 | IRST | Infra-red Search And Track |
| BOS | Battlefield Operating System |
| PDF | Panama[nian] Defense Forces (abolished 1990) - Portable Document Format - Principal Direction Of Fire |
| BSA | Birmingham Small Arms (motorcycles Company) - Boy Scouts Of America - Brigade Support Area |
| FCO | UK Foreign And Commonwealth Office |
| E | East |
| RSVP | Répondez S'il Vous Plaît. A French Phrase That Translates To "please Respond" And Word For Word Translation Is "respond If You Please." It Is Standard Practice To Reply To An RSVP Request Whether Confirming Attendance Or Declining. |
| FRA | French Language (ISO 639-2 Code) |
| CDE | Chemical Defence Equipment |
| SEAWIFS | Sea-Viewing Wide Field Of View Sensor (satellite Instrument) |
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