PROP can stand for:

• 6-N-Propylthiouracil (or PROP), a thionamide either tasting very bitter or tasteless depending on genetic makeup

• PROP (category theory), a certain symmetric strict monoidal category, in category theory

• Propulsion Engineer (PROP), space shuttle flight control position

• Preservation of the Rights of Prisoners (PROP), a UK prisoner's rights organisation set up in the early 1970s

• People's Republic of Poland, the Polish People's Republic. The Warsaw Pact state in Poland existing from 1947 to 1949.

See also

• Prop (disambiguation)