POS

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POS (countable and uncountable, plural POSes)

1. (law) Initialism of proof of service.
2. (linguistics) Initialism of part of speech.
3. (retail) Initialism of point of sale / point of service.
4. (computing) Initialism of proprietary operating system.
5. (navigation, aviation) Initialism of position and orientation system.
6. (vulgar or humorous, derogatory, slang, of a person or thing) Initialism of piece of shit.

POS

1. (Internet, text messaging) parent over shoulder (i.e. observing the young user's conversation)

• OPS, PSO, S.O.P., SOP, ops, sop