- 6C Group (6C for short)
- Hitachi
- JVC
- Matsushita
- Mitsubishi
- Toshiba
- Time Warner
DCA (DVD+RW Compatibility Alliance)
DVD Alliance participants are Dell, Hewlett-Packard, Mitsubishi Chemical, Sony, Philips, Ricoh, Thomson and Yamaha, among others. DVD + R, DVD + RW second version of the specification (4.7GB) is the 6C established in December 2002.