PRG

PRG can mean:
 * Parti radical de gauche (Radical Party of the Left), France
 * Paul Roos Gymnasium, school in Stellenbosch, South Africa
 * Post/Redirect/Get, in web applications
 * prg, ISO 639-3 language code for the Old Prussian language
 * Václav Havel Airport Prague, IATA code
 * Programming Research Group, Oxford University 1965-2011
 * Provisional Revolutionary Government of the Republic of South Vietnam, Viet Cong party
 * People's Revolutionary Government (Grenada)
 * Pseudorandom generator, of deterministic but pseudorandom numbers
 * .prg is a file format used for Commodore 64 software