A computer disk read by a laser beam, containing data prerecorded by a vendor. The buyer cannot enter or modify data in any way but the advantages lie in the speed of accessibility, relative immunity to damage, and relatively low cost of purchase.

Synonyms: Disk, WORM, Device, Optical Storage, Storage Devices, Optical, Disks, WORM, Optical Storage Device, Storage Device, Optical, WORM Disks, Optical Storage Devices, WORM Disk, Devices, Optical Storage