| Acronym | Meaning |
| RF | Radio Frequency - Receptive Field (neurophysiology) |
| GBR | United Kingdom Of Great Britain And Northern Ireland (ISO 3166 Trigram) |
| ITALY | I'll Truly Always Love You |
| WAAF | Women's Auxiliary Air Force (WWII UK) |
| IDL | Interface Definition Language |
| IER | Information Exchange Requirement |
| PTFE | PolyTetraFluoroEthylene |
| JCL | Job Control Language |
| HPT | High[er] Payoff Target |
| GM | The Gambia (ISO 3166 Digram) -GameMaster (role-playing) - General Motors - Genetically Modified -Germany (FIPS 10-4 Country Code) -Guru Meditation (computing) |