| Acronym | Meaning |
 | CLOB | Character Large OBject |
| ETC/RMT | Explosive Transient Camera/Rapidly Moving Telescope |
| IK | Inupiaq Language (ISO 639-1 Code) |
| SSN | Nuclear-Powered Attack Submarine (US Navy Hull Classification) -SIM Serial Number - Social Security Number - Socialist Solidarity Network - Subsystem Number (SCCP |
| HDL | High-Density Lipoprotein |
| HIPAA | U.S. Health Insurance Portability And Accountability Act |
| SMIL | Synchronized Multimedia Integration Language |
| LT | Lithuanian Language (ISO 639-1 Code) |
| TC | Teracoulomb - Turks And Caicos (ISO 3166 Digram) - United Arab Emirates (FIPS 10-4 Country Code; From Trucial Coast States) |
| UPS | Uninterruptible Power Supply - United Parcel Service |
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