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What is DVD+R, DVD-R and DVD±R?

DVD+R
DVD+Recordable defines a standard for recordable DVD drives and media defined by the DVDRW Alliance. Often called “plus R”, the format is write once (compared to DVD+RW wich can be erased and rewritten). The single sided discs can hold 4,700,000,000 bytes (4.38 Gigabytes at 1024 bytes to the kilobyte) with double sided discs holding twice as much. There are no dual layer single sided recordable discs. This format competes with the DVD Forum DVD-R specification.

DVD-R
DVD-Recordable defines a standard for recordable DVD drives and media defined by the DVD Forum. Often called “minus R”, the format is write once (compared to DVD-RW wich can be erased and rewritten). The single sided discs can hold 4,700,000,000 bytes (4.38 Gigabytes at 1024 bytes to the kilobyte) with double sided discs holding twice as much. This format competes with the DVD+R format.

DVD±R
A term used to cover both the DVD-R and DVD+R standards in one word.

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