DVD initially was supposed to stand for digital video disc, but because it can hold any type of data, not just video, members of the inter-corporation DVD Forum refer to it as a digital versatile disc.

A DVD burner is a device used to encode or “burn” information onto a blank DVD. A DVD is a form of storage media 12 cm (4.72 inches) or 8 cm (3.15 inches) across that can typically hold 4.7 gigabytes (GB) of information, enough to hold a three-hour movie at high quality, or ten TV episodes, or about 75 hours of .mp3 files, or roughly 15 hours of video in the lower-grade .avi format.

A DVD has a recording layer coated in an organic dye. A DVD burning laser, of higher intensity than a typical DVD reading laser, etches patterns into the dye, allowing the data to be read at a later date. A rewritable DVD uses a special metal alloy instead of a dye. The alloy can be switched back and forth between an amorphous and crystalline phase through the application of a laser, allowing the DVD to be rewritten a substantial number of times. Data quality degrades if the DVD is rewritten excessively, however.

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