| Acronym | Meaning |
 | BAOR | British Army Of The Rhine |
| LCM | Least/Lowest Common Multiple |
| NAN | Not A Number (computing) |
| OB | Obedience - Obligation - Obligatory - Obsolete - Obstetrics -Ocean Beach (California) - Off Break (cricket) - Old Bryanstonian - Order Of Battle - Outlet Box (electrical) -Overbought (stock Market) -Oversight Board |
| SCFS | Standard Cubic Foot Per Second (unit Of Measurement Of Fluid Flow) |
| SPS | Standard Positioning Service (GPS) |
| AHA | American Heart Association |
| AFI | French Territory Of The Afars And Issas (ISO 3166 Trigram; Obsolete Since 1977) - Agencia Federal De Investigaci›nes (M?xico) |
| HSC | High School Certificate (as Used In New South Wales) |
| SAE | Society Of Automotive Engineers - Stamped Addressed Envelope |
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