DVD (Digital Versalite Disc) . . .

 meaNing :

DVD - digital versatile disc or digital video disc, a type of optical disk technology similar to the CD-ROM. A DVD holds a minimum of 4.7GB of data, enough for a full-length movie. DVDs are commonly used as a medium for digital representation of movies and other multimedia presentations that combine sound with graphics.

(http://www.webopedia.com/DidYouKnow/Hardware_Software/2003/DVDFormatsExplained.asp)

DVD (also known as “Digital Versatile Disc” and “Digital Video Disc”) is a popular optical disc storage media format used for data storage. Its main uses are for movies, software, and data archiving. Most DVDs are of the same dimensions as compact discs (CDs) but store more than 6 times the data.

(http://en.wikipedia.org/wiki/DVD)

the Kinds of DVD :

•  DVD-Rom (data which can only be read and not written)
• DVD-R (be written once and then functions as a DVD-ROM)
• DVD-RAM (holds data that can be re-written multiple times)