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 in August 1996. Although Philips had aggressively promoted CD-i, by August 1993 "Computer Gaming World" reported that "skepticism persists about its long-term prospects" compared to other platforms like IBM PC compatibles, Apple Macintosh, and Sega Genesis. The magazine stated in January 1994 that despite Philips' new emphasis on games "CD-i is still not the answer for hardcore gamers", but the console "may yet surprise us all in the future". It recommended the CD-i with video cartridge for those needing to buy a new console as "The price is right and there is more software to support it", but 3DO was