There are several formats that already exist: DVD+R, DVD-R and DVD-RAM, but of these only the DVD-R printable format provides full compatibility with existing DVD Video players and DVD-ROM drives. DVD-R is supported by a group of seven companies: Verbatim / MCC, Philips, HP, Ricoh, Sony, Thomson and Yamaha. Always on the forefront of technology, verbatim have DVD-R media to support the initial PC and consumer video hardware launches. With conventional writable media, the recording layer does not deteriorates when writing, meaning no decrease in quality. SERL also enables this media to enjoy excellent archival stability and high-speed recording. This means users can enjoy perfect, high-speed data storage every time.