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Way Better than CD-ROM

Like CD-ROMs, a DVD can store regular computer data files, but with a capacity up to six times that of a CD data disc. This kind of DVD is called, appropriately enough, DVD-ROM. It can come in handy if you want to save the files on your computer's hard drive, but digital file backup wasn't the primary reason DVD was invented.

In the late 1990s, several big-name players in the motion picture industry joined forces to develop a new format for movie distribution. They wanted something that delivered high quality video, but was conveniently-sized like the popular CD format. It needed to be a digital format, not analog like the VHS standard. Most importantly, it needed to have strong copy-protection built in so people couldn't steal . . . er, duplicate and sell their own copies.


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