ZKP RTVS is short for Založba kaset in plošč Radiotelevizije Slovenija (originally), now Založba kakovostnih programov RTV Slovenija.
Slovenian label established in 1990, a successor to the state-owned RTV Slovenija (Radiotelevizija Slovenija).

Information about early cassette and last vinyl releases:
After RTV Ljubljana officially became DO RTV Slovenija on April 24, 1990, the label began branding their cassettes and vinyl products with Mladi Dolenjci - Očka Bom Postal).

Catalog numbers used by ZKP RTVS:
DD ####: CD (domestic artists 1990-1997)
DL ####: CD (foreign artists 1990-1994?)
KD ####: Cassette (domestic artists 1990-1997)
KL ####: Cassette (foreign artists 1990-1996)
LL-####: Vinyl (foreign artists 1990-1991)

1#####: CD (1997-)
2#####: CD (foreign artists reissues 1997-)
3#####: Cassette (1997-2006)
9#####: DVD (2003?-)