| Acronym | Meaning |
| SMIL | Sadomasochisterne I Landet (Danish SM Organisation) |
| GEV | Gigaelectron-volt |
| TMTOWTDI | There's More Than One Way To Do It (from Perl) |
| TCA | Transformational Communications Architecture -Turks And Caicos (ISO 3166 Trigram) |
| IUPAC | International Union Of Pure And Applied Chemistry (pronounced Eye-yoo-pac) |
| SSN | Nuclear-Powered Attack Submarine (US Navy Hull Classification) -SIM Serial Number - Social Security Number - Socialist Solidarity Network - Subsystem Number (SCCP |
| TSL | Transportation Security Laboratory |
| GEBCO | General Bathymetric Chart Of The Oceans |
| LOTIS | Livermore Optical Transient Imaging System |
| CSSCS | Combat Service Support Control System |