EMMELINE WATKINS / SCIENCE PHOTO LIBRARY EMMELINE WATKINS / SCIENCE PHOTO LIBRARY
Digital versatile discs (DVDs) stored on a spindle. These optical discs are used mainly for video and data storage. There are three main types of DVDs. DVD read only memory (DVD-ROM) data can only be viewed and not written, a recordable DVD (DVD-R) can only be written once for permanent recordings and a rewriteable DVD (DVD-RW) can re- write data multiple times.
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