DVD (also known as "Digital Versatile Disc" and "Digital Video Disc") is a popular
optical disc storage media format used for
data storage. Its main uses are for
movies, software, and data archiving. Most DVDs are of the same dimensions as compact discs (
CDs) but store more than 6 times the data.The term DVD is used in describing three ways that data is stored on the disks — DVD-ROM has data which can only be read and not written,
DVD-R can be written once and then functions as a DVD-ROM, and
DVD-RAM holds data that can be re-written multiple times.
DVD-Video and
DVD-Audio discs respectively refer to properly formatted and structured video and audio content. Everything else, including other types of DVD discs with video content, is referred to as a DVD-Data disc. DVD is also used generically to refer to
HD (High Density) video disc formats
Blu-ray and
HD DVD.
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