(Digital Versatile Disk ReWriter)- A- DVD- drive that can create (‘write’) rewriteable DVDs. There are several competing formats at the moment, but most recent drives support more than one format. It is likely that one of these formats will become standard in time, but at the moment it is not clear which. To add to the confusion, they tend to have very similar names : for example DVD+RW and DVD-RW are completely different formats, and incompatible with each other.