An optical disc (CD, DVD) or USB drive that contains ... on the bootable disk has complete control of the computer. See LiveCD and ISO image. THIS DEFINITION IS FOR PERSONAL USE ONLY.

A single electronic file that contains the identical content of an optical disc, including the ... CD or DVD at the destination computer. The files within the ISO image are not compressed; however ...

Using 3D storage techniques, scientists at the University of Shanghai for Science and Technology developed an optical disk capable of accommodating 1.6 petabits of data (that's 1.6 million gigabits).

The traditional approach to this problem was to spatially modulate a laser beam with an image of ~one million bits ... we explored an alternative approach extnending current optical disk technologies.

but this innovative optical disk memory condenses that space to the size of a desktop computer, significantly cutting costs. The significance of this development extends beyond sheer capacity.