The meaning of the Acronym OS is...

OS is

• Left eye (oculus sinister)
• Mouth
• Oral Surgery
• Oculus Sinister - Left Eye
• Oxygen Saturation
• Ocular Sinister

More Meanings For OS:

• Operating System
• Operating System
• Optimize For Size
• Open Source
• Open System
• Overhead Sending
• Online Services
• Open Server
• Operating System
• Open Source
• Open Sockets
• Operating System
• Operations System
• Orzya Sativa
• Osmium

OS is also in:

• Botany
• Chemistry
• Drivers
• General
• Networking
• Security
• Software
• Telecom