KSU is a Polish punk rock band and one of the earliest representatives of punk in Poland, founded in 1977 in the southeastern town of Ustrzyki Dolne in the Bieszczady Mountains. Young musicians from Ustrzyki met to play covers of Black Sabbath, Deep Purple and Led Zeppelin songs which they had heard on a radio tuned into Western European radio stations, beyond the Iron Curtain. In 1978 they came up with the name KSU, which comes from car license plates, issued by the Krosno Voivodeship authorities for vehicles from Ustrzyki Dolne. With a new name came new music - KSU was now motivated by Sex Pistols, Damned, and UK Subs.