| Acronym | Meaning |
| OEM | Original Equipment Manufacturer |
| IBRD | International Bank For Reconstruction And Development (part Of The World Bank) |
| LTP | Long-Term Potentiation |
| RMA | Return Mailing Authorization - Revolution In Military Affairs |
| ORR | Oak Ridge Reservation (U.S. DOE) - Office Of Rail Regulation (UK Government) - Office Of Refugee Resettlement - (CIA) Office Of Research And Reports - Operational Readiness Rate - Operational Readiness Review |
| IDL | Interface Definition Language |
| MPAA | Motion Picture Association Of America |
| JSP | Joint Services Publication |
| TRAIN | Tourist Railway Association |
| FQ | Baker Island (FIPS 10-4 Territory Code) - French Southern And Antarctic Territories (ISO 3166 Digram; Obsolete 1979) |