The meaning of the Acronym OS is...

OS is

• Operating Strength
• Operating System
• Opportunity to Serve
• On Station
• Ordnance Survey
• On Sea
• Other Specifications
• Old Skool
• Overtly Similar
• On Service
• Outer Sensor
• Operations Specialist

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