| Acronym | Meaning |
 | SC | Cruiser Submarine (US Navy Hull Classification) - Saint Kitts And Nevis (FIPS 10-4 Country Code; From Saint Christopher) - Seychelles (ISO 3166 Digram) - South Carolina (postal Symbol) |
| UPF | Universitat Pompeu Fabra (Catalan |
| PSV | Philips Sport Vereniging (Dutch For Philips Sports Union) - Public Service Vehicle |
| AGU | American Geophysical Union |
| IP | Clipperton Island (FIPS 10-4 Territory Code) -Initial Point - Intellectual Property - Internet Protocol |
| OOCL | Orient Overseas Container Line |
| EOTS | Electro-Optical Tactical Sensor |
| BSOD | Blue Screen Of Death (distinct From BSD) |
| US | United States (alsoISO 3166 And FIPS 10-4 Country Code Digram) |
| YWCA | Young Women's Christian Association |
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