Learn in the textbookOptical Disc Storage Media — CD, DVD, Blu-ray
DefinitionA DVD-ROM is a DVD whose contents are recorded at manufacture, and the user can only read it.
ExplanationThe contents are stamped onto the surface from a master disc, which suits making and distributing large runs of the same disc. It has been used for packaged films and for releasing large software. Following the DVD standard, it holds about 4.7GB on one side with one layer.
Memory hookThe name splits into "DVD + ROM", and the ROM at the end means Read Only.