optical disk

What is optical disk?

optical disk meaning in Information Science terminology / glossary / dictionary is:

A high-density direct access storage medium consisting of a specially coated disk on which data is encoded in a pattern of tiny pits burned into the surface with a laser, to be read by a device that reflects a laser beam off the pitted surface, then decoded by a microprocessor into digital signals. Optical disks can be read-only (audio CDs, CD-ROMs, DVDs, photo CDs, videodiscs), write once (WORM disks), or rewritable. They have far greater storage capacity than magnetic disks and are more robust. To learn more about optical disks, see How CDs Work, courtesy of HowStuffWorks. Also spelled optical disc. Synonymous with laser disk.

 

reference: ABC-CLIO