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CD-ROM Full Form

  • Last Updated : 03 May, 2020
Geek Week

CD-ROM stands for Computer Disc Read-Only Memory. The CD-ROM in all of its non-erasable, non-writable glory, existed long before it infiltrated our system with its youthful promise of infinite information. ROM stands for Read-Only Memory it cannot be altered or erased. Binary (Digital) data that is encoded on little pits on the optical disc are read by the laser beams which are situated in the Optical Reader. It is an Optical Disc that has the capacity to store Data, Music Files, Videos Files, Games, etc.


The CD-ROM format was introduced by a Japanese company Danon in 1982. Later on, CD-ROM was introduced by Danon and Sony at the 1st Japanese COMDEX computer show in 1985. After this the CD-ROM was famous and was used everywhere. It Started developing itself. The format of CD-ROM was introduced by Sony and Philips in 1983, which was called as Yellow Book.


  • CD-ROM is made up of clear poly-carbonate plastic, coated with a reflective material and a protective coat of clear lacquer.
  • CD-ROM can only be read by CD-ROM Readers. Normal readers cannot read the CD-ROM disks.
  • CD-ROM can hold up to 700 Megabytes of data, roughly 3, 00, 000 typewritten pages.
  • It can store Audios, still Videos, Pictures and Animated Graphics and full motion video as well.


  • CD-ROM can be accessed randomly.
  • CD-ROM is the most cost effective way to produce and distribute large quantities of data.
  • Compare to other storage disks, a CD-ROM is very rugged.
  • It is long-lasting.
  • It is a secure medium for storing large amounts of read only information.


  • The biggest complaint is that they are relatively slow.
  • Once it is filled up with data, new data cannot be entered on it.
  • Smaller storage capacity than hard disks.
  • It can be easily scratched and after the scratches it won’t work properly.
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