| Microsoft's next-generation operating system, Longhorn, will be compatible with high-definition DVD, the company's Japanese unit said Monday. 
The show of support from Microsoft is considered a boost for the next-generation, blue-laser DVD technology, which is promoted by Japanese conglomerates NEC and Toshiba. 
Blue light, with a shorter wavelength than the red laser used in conventional DVD recorders, can read and store data at the higher densities needed for high-definition recordings. 
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