| Acronym | Meaning |
 | W3C | World Wide Web Consortium |
 | SCM | Surface Contamination Module |
 | DTED | Digital Terrain Elevation Data (dee-ted) |
 | MHC | Major Histocompatibility Complex |
 | C3 OR C? | Colorectal Cancer Condition - Command |
 | CRI | Costa Rica (ISO 3166 Trigram) |
 | ASIO | Australian Security Intelligence Organisation -Audio Stream Input Output |
 | HAT | Highest Astronomical Tide (nautical Charts) -Hungarian Automated Telescope |
 | SHF | Super High Frequency |
 | NAMBLA | North American Man-Boy Love Association |