Cdroms, or compact discs that hold read-only memory, were first introduced to the market in 1982. They were created to replace the audio cassette tape, which was popular at the time. The first cdroms were single-sided and could store around 650 megabytes of data. By 1992, the format had improved and double-sided, high-density discs were available, which could store up to 1.3 gigabytes of data.

Cdroms are made up of tiny pits and lands that are imprinted on the surface of the disc. When a laser is shone on the disc, the pits reflect the light back to a sensor, …