| Acronym | Meaning |
| TC | Teracoulomb - Turks And Caicos (ISO 3166 Digram) - United Arab Emirates (FIPS 10-4 Country Code; From Trucial Coast States) |
| OSETI | Optical SETI |
| CO | Many |
| FSK | Federal'naya Sluzhba Kontrrazvedki (???????????? ??????? ?????????????? |
| FMRI | Functional Magnetic Resonance Imaging |
| TFMPP | Trifluorophenylmethylpiperazine |
| IVIS | Inter-Vehicle Information System |
| CSRF | Cross-Site Request Forgery |
| BRE | Breton Language (ISO 639-2 Code) |
| CSI | See Entry |