A CD, short for "Compact Disc," is a type of digital optical disc used for storing and playing back digital audio, video, and data. It was first introduced in 1982 and quickly became popular as a replacement for vinyl records and cassette tapes.
A standard CD has a diameter of 120 millimeters and can store up to 700 megabytes of data. CDs are read by a laser beam that reflects off the disc's surface, and the data is stored as a series of microscopic bumps and pits on the disc. When the laser reads the disc, it detects these bumps and pits and translates them into digital information that can be played back through a CD player or other compatible device.
In addition to standard audio CDs, there are also other types of CDs, such as CD-ROMs (read-only memory discs used for computer data storage), CD-Rs (recordable CDs that can be burned with data or audio), and CD-RWs (rewritable
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CD is also use to install a software
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