Blue Book (CD standard) file system may also be included for compatibility with Mac OS computers. The mandatory files and directories include an autorun.inf file compatible with the Windows 95 AutoRun feature; a CDPLUS and a PICTURES directories; and an optional DATA directory. The term "enhanced CD" is also an umbrella term and a certification mark used to refer to different CD formats that support audio and data content, including mixed mode CDs, CD-i and CD-i Ready. Blue Book (CD standard) The Blue Book is a compact disc standard developed in 1995 by Philips and Sony. It defines the Enhanced Music CD format (E-CD,
Philips CD-i The CD-i was abandoned by 1996 and was a commercial failure, estimated to have lost Philips as much as one US billion dollars in the American market. Philips at first marketed CD-i as a family entertainment product, and avoided mentioning video games to not compete against game consoles. Early software releases focused heavily on educational, music, and self-improvement titles, with only a few games, many of them adaptations of board games such as "Connect Four". However, the system was handily beaten in the market for multimedia devices by cheap low-end PCs, and the games were the best-selling software. By 1993