CD-R CD-R CD-R (Compact Disc-Recordable) is a digital optical disc storage format. A CD-R disc is a compact disc that can be written once and read arbitrarily many times. CD-R discs (CD-Rs) are readable by most plain CD readers, i.e., CD readers manufactured prior to the introduction of CD-R. This is an advantage over CD-RW, which can be re-written but cannot be played on many plain CD readers. Originally named CD Write-Once (WO), the CD-R specification was first published in 1988 by Philips and Sony in the 'Orange Book'. The Orange Book consists of several parts, furnishing details of the CD-WO,
Philips CD-i best software required the MPEG upgrade card. By mid-1996 the U.S. market for CD-i software had dried up and Philips had given up on releasing titles there, but continued to publish CD-i games in Europe, where the console still held some popularity. With the home market exhausted, Philips tried with some success to position the technology as a solution for kiosk applications and industrial multimedia. In addition to consumer models, professional and development players were sold by Philips Interactive Media Systems and their VARs. Philips marketed several CD-i player models. There also exist a number of hard-to-categorize models, such as