DVDs Information

DVD, also known as Digital Versatile Disc or Digital Video Disc, is an optical disc storage media format, and was invented and developed by Sony, and Philips in 1995. Its main uses are video and data storage. DVDs are of the same dimensions as compact discs , but store more than six times as much data.

Variations of the term DVD often indicate the way data is stored on the discs: DVD-ROM has data that can only be read and not written; DVD-R and DVD+R can record data only once, and then function as a DVD-ROM; DVD-RW , DVD+RW, and DVD-RAM can all record and erase data multiple times. The wavelength used by standard DVD lasers is 650 nm; thus, the light has a red color.

DVD-Video and DVD-Audio discs refer to properly formatted and structured video and audio content, respectively. Other types of DVDs, including those with video content, may be referred to as DVD Data discs.

Wikipedia, DVDs, http://en.wikipedia.org/wiki/Dvds (as of Apr 1, 2010)

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