DVD RAM (Re-Recordable)

DVD-RAM is a re-recordable recording format for the storage of video and data, it can store 4.7GB (4.38GB in computing terms)
Most existing DVD players cannot play DVD-RAM Discs
DVD-RAM is an official "DVD-Forum" format and so can bear the familiar DVD logo.
DVD-RAM allows for a full range of none linear editing options, similar to minidisc but only playable on the recorder itself or machines that are specified as being able to play DVD-RAM discs
DVD-RAM discs can also have a protective caddy to prevent damage and also feature sophisticated error and defect management making it the most robust of the re-recordable DVD formats.