a disk for storing computer data. The information is recorded and read by a laser.
Compact Discs with Read Only Memory have a storage capacity of 650â€“800 MB â€” far greater than the 1.44 MB of floppy disks and they are also more reliable. Information from a Compact Disc with Read Only Memory can be accessed, but not changed or overwritten.
A read-only disk storage technology that provides up to 600Mb of space in about the same space as a 3.25" computer diskette (which stores 1.44Mb). A CD ROM drive is required to access and use data stored in this format and the data cannot be changed or updated. Access speeds are slower than from a standard computer disk drive.