PRF

PRF is an acronym and can stand for:

• Platelet Rich Fibrin, A combination of platelets and fibrin used to regenerate tissue
• PRF-3, the call letters of the now defunct TV Tupi, Brazil's first television station
• Pain Relief Foundation
• Primitive recursive function - a class of functions which form an important building block on the way to a full formalization of computability
• Pseudorandom function - in cryptography to refer to a function with values seemingly chosen randomly within its range
• Pulse repetition frequency - a characteristic of a radar transmitter
• Pennsylvania Renaissance Faire
• Passer rating formula, a system used to rate passers in American football
• Pontine reticular formation
• Polícia Rodoviária Federal is the Federal Highway Police of Brazil
• Pacific Ring of Fire, a ring of volcanoes circuling the Pacific Ocean