USO

USO is a TLA that may stand for:

• Ultra stable oscillator
• Unidentified submarine object
• Union der Schülerorganisationen (uso.ch)
• Unique sink orientation
• United Service Organizations (US, uso.com, uso.org)
• 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