How DVD differs from CD?
CD is an acronym for Compact Disc. DVD stood for digital versatile disc. Although DVD has the same media size and shape as CD, a. DVD can hold as much as seven times the amount of data. b. DVDs are able to access data much faster than that of CDs. c. DVDs use Universal Data Format (UDF), but CDs are not compatible with this format. d. A DVD can be written to on one or both sides; a CD is read from and written to one side.