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What is DVD?

DVD is a new form of storage media based on the compact disc. Originally called Digital Video Disc, it is now more frequently referred to as Digital Versatile Disc because it can be used to store computer data as well as video. Physically similar to a CD, a single-layer, single-sided DVD has a maximum capacity of 4.7GB -- up to seven times the capacity of a CD-ROM disk (or 2 hours of MPEG-2 video). A double-layer, double-sided DVD-ROM disk has thirty times the capacity of a CD-ROM (over 17 GB). The DVD specification supports access rates of 600KBps to 1.3MBps.

DVD-ROM is DVD when used as computer storage. DVD-R is a once-recordable form of DVD, which requires a special drive and media, and DVD-RAM is a multiple-write capable form of DVD.

DVD-ROM players are capable of reading CD-ROMs, CD-I disks, and video CDs, as well as new DVD-ROMs. Newer DVD players can also read CD-R disks.

For more information about DVD, see the online DVD FAQ at:

  http://web.ukonline.co.uk/s.roberts/faq.htm

Also, see:

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Last updated on May 18, 1998
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