| Acronym | Meaning |
| IRB | International Rugby Board |
| EE | Estonia (ISO 3166 Digram) -Electrical Engineering - Electrical Engineer |
| DECSIM | Model DEComposition And SIMulation Algorithm - Directed Energy Combat SIMulation |
| ATC | Air Traffic Control - Air Training Corps - U.S. Air Transport Command (1942-1948) |
| LYLAS | Love You Like A Sister |
| AFES | Automatic Fire Extinguishing System |
| DERA | British Defence Evaluation And Research Agency (1995?2001) |
| B?C | Blue ?yster Cult |
| YW | Yoctowatt |
| OD | Old Dragon - Ordnance Datum (nautical Charts) -Overdose |