Short for Digital Versatile Disc is a type of optical disk technology similar to the CD- ROM.A DVD holds a minimum of 4.7GB of data, enough for a full-length movie. DVDs are commonly used as a medium for digital representation of movies and other multimedia presentations that combine sound with graphics.
A CD is a pre-pressed optical compact disc which contains data. The name is an acronym which stands for “Compact Disc Read-Only Memory”. Computers can read CD-ROMs, but cannot write on the CD-ROMs which are not writable or erasable.
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