Holographic Compact Discs are standard Compact Discs with a holographic design incorporated into them. These appear on both sides of the disc, and the playing area is kept within the 3-inches of a mini CD single, limiting playing time. The playable part of the disc conforms to Red Book standards.
A handful of singles and interview discs were released, mostly between 1991 and 1993. Almost all releases were mastered by Nimbus and Applied Holographics.