| Acronym | Meaning |
| USNO | U.S. Naval Observatory |
| MICOM | Missile Command |
| SY | Syria (ISO 3166 And FIPS 10-4 Country Code Digram) |
| AZE | Azerbaijan (ISO 3166 Trigram) |
| HETT | Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor |
| AWACS | Airborne Warning And Control System |
| FJ | Fiji (ISO 3166 Digram; FIPS 10-4 Country Code) |
| OSETI | Optical SETI |
| TCHD | Truck Cargo Heavy Duty |
| OHIP | Ontario Health Insurance Plan |