Black Book (non-standard disc format)

Black Book is an unofficial designation of optical disc (OD) formats that defy official standards for CD, DVD, HD DVD and Blu-ray Discs. Most formats considered Black Book are formats used for video games or Digital Rights Management.

Black Book disc examples:

• The audio side of a DualDisc (the audio side is too thin to qualify as a standard CD; the video side is a standard DVD)
• CD-based
  • NEC PC Engine (CD-ROM²)
  • Sega Saturn
  • Sega Dreamcast (GD-ROM)
  • VideoNow Personal Video Disc (PVD)
• DVD-based
  • The DVD-Video format itself is sometimes regarded as "black book" since it has no official rainbow book, despite being more standardized than other so-called "black book" formats.
  • Nintendo optical discs
    • Nintendo GameCube Game Disc (Nintendo GameCube)
    • Wii Optical Disc (Wii)
  • Xbox
  • Xbox 360
• Blu-ray-based
  • Wii U Optical Disc (Wii U)