| Acronym | Meaning |
 | FO | Faroe Islands (ISO 3166 Digram; FIPS 10-4 Territory Code) -Force Operations (military) - Forward Observer - Frame Optional (military Symbology) |
| ALB | Albania (ISO 3166 Trigram) |
| DMU | Diesel Multiple Unit - A Method Of Connecting Self-propelled Railway Vehicles Together To Form A Train Under The Control Of One Driver. |
| FR | France (FIPS 10-4 Country Code; ISO 3166 Digram) |
| BO | Back Orifice -Belarus (FIPS 10-4 Country Code) - Bolivia (ISO 3166 Digram) -Body Odor |
| SC | Sardinian Language (ISO 639-1 Code) |
| RW | Kinyarwanda Language (ISO 639-1 Code) |
| MPSI | Member Of The Pharmaceutical Society Of Ireland |
| SBCCOM | U.S. Army Soldier And Biological Chemical Command (disbanded 2003) |
| FC | Femtocoulomb |
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