a compact disc
CD or compact disc DVD or digital versatile disc Mini SD
The Compact Disc is a spin-off of Laserdisc technology. Sony first publicly demonstrated an optical digital audio disc in September 1976.
two types - magnetic in the form of magnetic tape,magnetic disc and optical in the form of compact disc.
Sony first publicly demonstrated an optical digital audio disc in September 1976.
The first digitally recorded optical disc was a 5-inch audio compact disc (CD) in a read-only format created by Philips and Sony in 1975.
Basically Compact Discs are of two types: CD - RCD - RWA CD-R(Compact Disc-Recordable) is a variation of the Compact Disc invented by Philips and Sony. CD-R is a Write Once Read Many (WORM) optical medium, although the whole disk does not have to be entirely written in the same session.A CD-RW(Compact Disc-ReWritable) is a rewritable optical disc. It was introduced in 1997, and was known as "CD-Writable" during development.
A hard disk is inside a computer; it holds the operating system and saved files. A compact disc is optical media, such as an audio CD or data CD. CDs are identical in size and shape to a DVD.
Philips Introduce Compact Disc"in Eindhoven, The Netherlands on March 8, 1979.Sony first publicly demonstrated an optical digital audio disc in September 1976.
what are the advantages of compact disc
CD stands for compact disc.