Blu-ray is a new optical disc standard based on the use of a blue laser rather than the red laser of DVD players. The standard was developed collaboratively by Hitachi, LG, Matsushita (Panasonic), Pioneer, Philips, Samsung, Sharp, Sony, and Thomson. Toshiba and NEC are among the companies promoting a competitive optical format, HD-DVD. Blu-ray’s storage capacity is enough to store a continuous backup copy of most people’s hard drives on a single disc.
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