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 Records its classical artists, although classical recordings have also been issued on the regular Philips label. In the US, Philips eventually handled distribution and sales for Philips, Mercury, British Decca (sold under the London label in the US) and Deutsche Grammophon. In 1983, Philips became the first record label to issue compact discs, using digital recordings that had been recorded since 1978. Philips and its subsidiaries eventually re-issued many of its pre-digital stereo and mono recordings on compact disc. Philips and DuPont partnered in four CD manufacturing plants in Hanover, Germany; Blackburn in the UK (formerly the Philips Laservision Disc factory);