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Brian Cryer's Glossary of IT Terms with Links


Digital Video Disk, or Digital Versatile Disk. DVDs have varying capacities from 4.7GB to 17GB.

A conventional single layer recordable DVD will hold up to 4.7GB of data per disk. A recordable dual-layer DVD will hold up to 8.5GB of data. Dual-layering allows two layers to be stored on the same side of the DVD. When playing a DVD there is normally a slight pause when the DVD player switches layers (as the laser repositions to read the second layer).

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