| Acronym | Meaning |
| ISA | Individual Savings Account - Industry Standard Architecture - Instruction Set Architecture - International Seabed Authority |
| IR | Infrared - Intelligence Requirement (military) -Iran (FIPS 10-4 Country Code; ISO 3166 Digram) - Iran Air (IATA Alpha Code) See Entry For More |
| SNM | Special Nuclear Material |
| ACP | Air Control Point |
| KITECH | Korean Institute Of Industrial Technology |
| SWT | Sea Water Tank |
| CD | Candela |
| SNE | Synthetic Natural Environment |
| HY | Armenian Language (ISO 639-1 Code) |
| PANS | Pretty Advanced/Awesome Network Services (cf. POTS) |