Explanation

The abbreviation “MB” stands for “megabyte,” a unit of computer storage.

Unit                 Description

Megabyte 1024 kilobytes

Gigabyte         1024 megabytes

Terabyte         1024 gigabytes

Petabyte         1024 terabytes

Explanation

A CD-ROM is a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs