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• n  a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface

• optical disk

News & Articles

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• A Blu-ray Disc That Lasts 1,000 Years Guarantees Caddyshack Lives On
  They last a lot longer than the tape-based storage of yesteryear, but optical discs, particularly the type you burn at home, aren't guaranteed to survive even a decade. So if you want to pass on that wedding video/vacation photos/copy of Caddyshack to your great-great grand kids, you'll want to opt for Millenniata's new 25GB Blu-ray compatible M-DISCs which are guaranteed to last at least 1,000 ...
  June 6, 2013 - Gizmodo