| Acronym | Meaning |
| AA | Attoampere |
| IPCC | Intergovernmental Panel On Climate Change |
| EPGS | EOS Polar Ground Sites |
| GCSE | General Certificate Of Secondary Education (UK) |
| RCA | Radio Corporation Of America - Root Cause Analysis - Royal Canadian Artillery - Royal City Avenue (famous Entertainment Zone In Thailand) |
| ZR | Zirconium |
| RARDE | UK Royal Armament Research And Development Establishment (1962?1991) |
| CIB | Complete In Box (Internet Auction/trading Listings) |
| BARD | Binational Agricultural Research And Development Fund (between The US And Israel) |
| OSS | Office Of Strategic Services (1942?1945 |