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A feature etched in a DVD glass master which has a length of 3 to 14 timing pulses. Information on pre-recorded DVDs is encoded into a spiral track, made up of pits. Recordable DVDs do not have pits. Instead, marks are created in a dye layer, or on a phase-change recording layer. The background of this web page is made from an Atomic Force Microscope image of DVD pits.

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