The meaning of the Acronym UOS is...

UOS is

• U Owe Sam

More Meanings For UOS:

• University Of Sarghodha
• Undelivered Order Schedule
• Unless Otherwise Specified
• Under One Sun
• University Of Scouting
• Micro Operating System
• Upstream Optimization Suite
• Universal OPC Server
• Units of Service Edits
• UCAV Operational System
• U Owe Sam
• Utah Ornithological Society
• Sewanee, Tennessee USA

UOS is also in:

• Airport Codes
• Chat
• General
• Military
• Networking
• Non-Profit Organizations
• Scouting
• Telecom
• Unfiled
• Universities