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DVD

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ALSO CALLED: Video Disks, Digital Video Disks, DVD-R, DVD-ROM, Recordable DVD
DEFINITION: Recordable DVD (sometimes called writable DVD) is a DVD technology that allows a PC user to write data one or more times to a DVD with the PC's DVD drive. Among the various formats available are: DVD-RAM (DVD-Random Access Memory), a rewritable format that can be rewritten over 100,000 times; DVD-R (DVD-Recordable), a record-once format; DVD-RW (DVD-Rewritable) and DVD+RW (DVD-Rewritable), two similar,  … 
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DVD DEFINITION (continued): …  but incompatible formats that can be rewritten numerous times; and DVD Multi, a rewritable format that will enable the other formats to play in its drives.Panasonic, Philips, and Pioneer have recently released three versions of recordable DVD. All three of the systems use a red laser, which has a 650-nanometer (nm) wavelength. Write once, read many (WORM) versions are written with organic dye-based media, and rewritable versions are written with phase change technology. Single-sided writable DVD disks, like the non-recordable version, can store 4.7 gigabytes (GB) of data.Recordable DVD formats … 
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