| Acronym | Meaning |
 | CBC | Canadian Broadcasting Corporation - Christmas Bird Count - Cipher-Block Chaining - Cornering Brake Control |
| MAC | Macao (ISO 3166 Trigram) -U.S. Military Airlift Command (1966-1992) |
| JSS | Joint Support Ship |
| SQL | Structured Query Language (seek-well) |
| WSTC | Women Signallers Territorial Corps (WWII UK) |
| HT | Haitian Creole Language (ISO 639-1 Code) |
| IGY | International Geophysical Year |
| OSI | Office Of Strategic Influence - Ontario Swine Improvement - Open Source Initiative - Open Systems Interconnection |
| ITU | Intent-to-Use - International Telecommunication Union (International Telegraph Union 1865-1932) |
| HIPPARCOS | HIgh Precision Parallax COllecting Satellite |
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