CD-ROM developed by Japanese company Denon in 1982. It was an extension of Compact Disc Digital Audio, and adapted the format to hold any form of digital data, with a storage capacity of 553 MiB. CD-ROM was then introduced by Denon and Sony at a Japanese computer show in 1984. The "Yellow Book" is the technical standard that defines the format of CD-ROMs. One of a set of color-bound books that contain the technical specifications for all CD formats, the "Yellow Book", standardized by Sony and Philips in 1983, specifies a format for discs with a maximum capacity of 650 MiB.
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"