A CD ROM is a type of optical disk that is used to store digital data. It was first introduced in 1985 and was popularized in the early 1990s. CD ROMs are read by a CD ROM drive, which is a type of optical drive.

CD ROMs are made up of tiny bumps that are imprinted on a circular disk. These bumps are called “pits.” When a CD ROM is read, a laser shines on the disk and the bumps cause the light to reflect back. The reflected light is then interpreted by a computer to create an image or …