PRF may refer to: Science and technology Physical register file, in CPU design Platelet rich fibrin Pontine reticular formation Positive-real function in mathematics Programmed ribosomal frameshifting during mRNA translation Pseudorandom function family Pulse repetition frequency Organizations Polícia Rodoviária Federal, the Federal Highway Police of Brazil Progeria Research Foundation Business Pasture, rangeland, and forage insurance, a type of crop insurance for livestock growers Other uses Perfect (grammar), a tense