POS, Pos or PoS may refer to:
== Business ==
Point of sale, location where payment is accepted
== Health and medicine ==
Point of service plan, a type of managed care health insurance plan in the United States
Polycystic ovary syndrome, a disease of the ovaries
== Linguistics ==
Part of speech, the role that a word or phrase plays in a sentence
Sayula Popoluca (ISO 639-3), an indigenous language spoken in Veracruz, Mexico
Poverty of the stimulus, a linguistic term used in language acquisition and development
== Music ==
P.O.S (born 1981), or Stefon Alexander, American hip hop artist...