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In October of 2003, it was demonstrated that dual layer technology could be used with a DVD+R disc to nearly double the capacity to 8.5 GB per disc. Manufacturers are expected to incorporate this technology into commercial devices sometime during 2004.
Unlike DVD+RW discs, DVD+R discs can be only be written to once. Because of this, DVD+R discs are suited to applications such as nonvolatile data storage, audio, or video.
One competing format is DVD-R. Hybrid drives that can handle both, often labeled "DVD±RW, are very popular since there is not yet a single standard for recordable DVDs.