DVD, also known as Digital Versatile Disc or Digital Video Disc, and was invented and developed by TOSHIBA, and TIME WARNER in 1995.DVD's are mainly used for video and data storage. Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of stilled images representing scenes of motion. The term data means groups of information that represent the qualitative or quantitative attributes of a variable or set of variables. DVDs are of the same dimensions as compact discs (CDs), but storage is more than six times as much concerned with data. DVD-ROM (read only memory) contains data that can only be read and not written. DVD-R and DVD+R (recordable) have the capacity to record data only once, and then can it function as a DVD-ROM. DVD-RW (re-writable). DVD-R is a DVD which is in recordable format, and it has a typical storage capacity of 4.71 GB or 4.38 GiB. Data on a DVD-R cannot be changed.