USO
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USO is a TLA that may stand for:
- Udaipur Solar Observatory
- Ultra stable oscillator
- Unidentified submarine object
- Union der Schülerorganisationen (uso.ch (http://www.uso.ch))
- Unique sink orientation
- United Service Organizations (US, uso.com, uso.org (http://www.uso.com))
- Universal service obligation
- Universal Service Order
- UNIX Software Operation (AT&T)
- Unión Sindical Obrera Colombian Labour Union [www.nodo50.org/usocolombia]
- Unión Sindical Obrera Spanish Labour Union
- Utica Symphony Orchestra