DVDs are a form of technology used for storing information in a digital format. The meaning of the term is somewhat contested, with some sources insisting that the letters DVD do not denote any particular meaning, while others contend that the term is an abbreviation for digital versatile discs. There are six core formats for DVDs, the features of which overlap in certain aspects: DVD Video, DVD-ROM, DVD-R, DVD-RAM, DVD-RW, and DVD Audio. In each case, the digital optical disc requires a DVD player that reads the information stored in the depressions (pits) and contrasting flat areas (lands) within the grooves of the physical object. That is, the red laser within the DVD player reads the information that is stored by decoding the MPEG-2 coding, ...

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