| Acronym | Meaning |
| ROC | Receiver Operating Characteristic (statistics) - Regional Operations Centre - Republic Of China - Roc-A-Fella Records |
| KS | Kilosiemens |
| PACOM | (U.S.) Pacific Command |
| JL | Japan Airlines (IATA Airline Designator) |
| LER | Loss-Exchange Ratio |
| TDP | Technology Demonstration Programme |
| FM | Femtometre |
| IR | Infrared - Intelligence Requirement (military) -Iran (FIPS 10-4 Country Code; ISO 3166 Digram) - Iran Air (IATA Alpha Code) See Entry For More |
| AAODL | Atmospheric Aerosols And Optics Data Library |
| CCT | Current Commitments Team |