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 rights from CDMATICS. In 1995 Philips introduced CD-Online, a service which provided the CD-i with full internet access (with a 14.4k modem), including online shopping, email, and support for networked multiplayer gaming on select CD-i games. The service required a CD-i player with DV cartridge, and an "Internet Starter Kit" which initially retailed for £99.99. Andy Stout, a writer for the official CD-i magazine, explained CD-Online: The CD-Online service went live in the UK on October 25, 1995 and in March 1996 in the Netherlands (for 399 guilders). The system was reportedly scheduled to launch in the US as "Web-i"