| Acronym | Meaning |
 | PDU | Police Dog Unit - Power Distribution Unit - Protocol Data Unit |
| SSN | Nuclear-Powered Attack Submarine (US Navy Hull Classification) -SIM Serial Number - Social Security Number - Socialist Solidarity Network - Subsystem Number (SCCP |
| TEST | Thesaurus Of Engineering And Scientific Terms |
| OPCON | Operational Control |
| MATS | U.S. Military Air Transport Service (1948-1966) |
| USEC | United States Enrichment Corporation |
| TBT | Tributyltin |
| UESAC | Uppsala-ESO Survey Of Asteroids And Comets |
| DA | Denmark (FIPS 10-4 Country Code) -U.S. Department Of The Army - District Attorney |
| SW | Swahili Language (ISO 639-1 Code) |
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