I've only ever seen this practice used to refer to "Operating System" with "O/S", but according to The Free Dictionary there are a few more. Why is the slash in the middle sometimes used? Isn't "OS" or "O.S." more appropriate?
English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. It only takes a minute to sign up.Sign up to join this community