What does dual format DVD mean?

I just bought a DVD RW driver, it is dual format, what does it mean?
Thanks for your help!

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• 回複：What does dual format DVD mean? -121919- ♀ (32 bytes) () 05/02/2006 postreply 11:12:35

• It writes to both DVD+R(W) and DVD-R(W) disks. -greenpine_1234- ♀ (0 bytes) () 05/02/2006 postreply 12:50:54