What does OS stand for?

What does OS mean?

OS	Other Specifications Governmental » Military
OS	Other Supplementary Governmental » US Government
OS	Out Sized Business » Positions
OS	outer segment Medical » British Medicine
OS	Outer Sen Miscellaneous » Unclassified
OS	Outer Sensor Governmental » Military
OS	Outer Space Governmental » NASA
OS	Outside Scope Governmental » FBI Files
OS	Outside Shot Community » Sports
OS	Outstanding Student Academic & Science » Universities
OS	Ouvrier spécialisé International » French
OS	Over Sized Miscellaneous » Clothes
OS	Overall Survival Medical » Oncology
OS	overall survival Medical
OS	Overhead Sending Computing » Networking
OS	Overhead Spending Business » General
OS	overlap syndrome Medical » British Medicine
OS	Overly Short Miscellaneous » Unclassified
OS	Overseas Studies Academic & Science » Universities
OS	Overtly Similar Governmental » Military
OS	Ownage Squad Miscellaneous » Unclassified
OS	oxidative stress Medical » British Medicine
OS	Oxygen Saturation Medical » Physiology