Difference between Os and OS

Os

Part of speech: noun

Definition: Bone. A mouth; an opening. In particular, either end of the cervix, internal (to the uterus) or external (to the vagina).

OS

Part of speech: initialism

Definition: Ordnance Surveyoperating systemoculus sinister (OS) - left eyeoutsizeOld Style (OS), a term used in English language historical studies to indicate that a date conforms to the Julian calendar

Part of speech: noun

Definition: an Ordnance Survey map.