PRF

PRF is an acronym and can stand for:

* PRF-3, the call letters of the now defunct TV Tupi, Brazil's first television station
* Pain Relief Foundation
* Password Request Form or Password Report Form in clinical trial
* Point Response Function - in observational astronomy
* Primitive recursive function - a class of functions which form an important building block on the way to a full formalization of computability
* Patient Report Form - in First Aid and hospitals
* Problem Report Form - in Auditing
* Pseudorandom function - an idealized cryptographic hash function
* Pulse repetition frequency - a characteristic of a radar transmitter
* Pennsylvania Renaissance Faire