The meaning of the Acronym OS is...

OS is

• Original Special
• Offentlik Sak
• Organ Series
• Ophiological Services
• Old Sebilis
• Old Style
• Old Suisun
• Omnipotent Spirituality
• Operating Style
• Object Summary
• Outer Sen
• Operational Sponge
• Os Stands
• Other Source
• Ole Syversen
• Off Site
• Ozone Safe
• A Outside System
• Oculus Sinister
• Ownage Squad
• On Serotta
• A On Surveillance
• Orchard Street
• Occulus Sinister
• Oooh Shizzit
• Overly Short
• Online Service
• Open Space
• Omega Strain
• On Steroids
• Ostrich Source
• Orthopaedic Surgeon

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