| Acronym | Meaning |
| RKO | Radio-Keith-Orpheum Pictures |
| TR | Turkey (ISO 3166 Digram) |
| 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 |
| CBS | Columbia Broadcasting System - Corps Battle Simulation |
| SM | Sado-Masochism -San Marino (ISO 3166 And FIPS 10-4 Country Code Digram) -Soldier's Manual -Submarine Minelayer (US Navy Hull Classification) |
| ASC+T | Anti Slip Control + Traction |
| NS | Nanosiemens |
| GPMP | General Purpose Macro Processor |
| BG | Bangladesh (FIPS 10-4 Country Code) -Battle Group - Body Guard -Brigadier General -Bulgaria (ISO 3166 Digram) |
| ASW | AntiSubmarine Warfare |