| Acronym | Meaning |
 | CT | Canton And Enderbury Islands (ISO 3166 Digram; Merged Into KI In 1984) - Central African Republic (FIPS 10-4 Country Code) - Connecticut (postal Symbol) |
| IPTV | Internet Protocol TeleVision |
| PLD | Probable Line Of Deployment |
| MHWN | Mean High Water Neaps (nautical Charts) |
| BALCO | Bay Area Laboratory Co-operative |
| NUWC | U.S. Naval Undersea Warfare Center |
| SIYSS | Stockholm International Youth Science Seminar |
| SST | SuperSonic Transport -Training Submarine (US Navy Hull Classification) - Saturated Suction Temperature (refrigeration Cycles) |
| FSC | Federal Supply Classification -Forest Stewardship Council (ecological Pressure Group) |
| MTQ | Martinique (ISO 3166 Trigram) |
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