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 that though Philips had a large booth at the 1995 Electronic Entertainment Expo, there was no CD-i hardware or software on display. "Next Generation" scored the console one out of five stars. After its discontinuation, retrospectively, the CD-i was overwhelmingly panned by critics who blasted its graphics, games, and controls. Microsoft CEO Bill Gates admitted that initially he "was worried" about the CD-i due to Philips's heavy support for the device and its two-pronged attack on both the games console and PC markets, but that in retrospect "It was a device that kind of basically got caught in the middle.