A rewritable DVD disc is a media which allows rewriting many times. It will have functions and applications similar to those of floppy discs or MO (magneto-optical) discs and a large capacity (2.6GB for single side, 5.2GB for double side, and more capacity will be available in future). It will be an efficient rewritable medium for handling and storing data which requires large capacity, such as moving pictures.

For writing on a disc, a DVD-RAM(rewritable) drive connected to a computer is required.Because ultra-precise writing is necessary, even a fingerprint left on a writing side of a disc before writing would change the optical intensity so that accurate writing could not be achieved. Therefore, a DVD-RAM(rewritable) disc will be contained in a special cartridge.