| Acronym | Meaning |
 | COROT | COnvection |
| EGY | Egypt (ISO 3166 Trigram) |
| XIX | Nineteen (in Roman Numerals) |
| AU | African Union (was OAU Before 2000) - American University -Astronomical Unit - Australia (ISO 3166 Digram) - Austria (FIPS 10-4 Country Code) |
| NIMA | National Imagery And Mapping Agency (became NGA) |
| SQ | Albanian Language (ISO 639-1 Code) |
| EOSDIS | Earth Observation Satellite Data And Information System |
| MDO | Membership Driven Organisation |
| MATS | U.S. Military Air Transport Service (1948-1966) |
| NESP | NSA/CSS Enterprise Standards Program |
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