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Some CD pressing systems can use digital master tapes, either in Digital Audio Tape, Exabyte, Digital Linear Tape, Digital Audio Stationary Head or Umatic formats. A PCM adaptor is used to record and retrieve digital audio data into and from an analog videocassette format such as Umatic or Betamax.
The compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. It uses the Compact Disc Digital Audio format which typically provides 74 minutes of audio on a disc.
The CD jewel case is designed to carry a booklet, as well as to have panel inserts. These may be used to display album artwork, lyrics, photos, thank-yous, messages, biography, etc. [5] Because the CD jewel case is the standard, most-commonly used CD case, it is much cheaper. The price of the CD jewel case usually ranges from $0.75 to $0.95.
An optical jukebox is a robotic data storage device that can automatically load and unload optical discs, such as Compact Disc, DVD, Ultra Density Optical or Blu-ray and can provide terabytes (TB) or petabytes (PB) of tertiary storage. The devices are often called optical disk libraries, "optical storage archives", robotic drives, or ...
The first commercial digital disk storage device was the IBM 350 which shipped in 1956 as a part of the IBM 305 RAMAC computing system. The random-access, low-density storage of disks was developed to complement the already used sequential-access, high-density storage provided by tape drives using magnetic tape.
The CD-ROM was announced in 1984 [7] and introduced by Denon and Sony at the first Japanese COMDEX computer show in 1985. [8] In November 1985, several computer industry participants, including Microsoft, Philips, Sony, Apple and Digital Equipment Corporation, met to create a specification to define a file system format for CD-ROMs. [9]
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