HARD DISK

RAM

RAM is the memory or information storage in a computer that is used to store running programs and data for the programs.

ROM

is a type of storage medium that permanently stores data on personal computers and other electronic devices.

Hard disk

is something used by computers to store information. Hard disks use magnetic recording (similar to the way recording is done on magnetic tapes) to store information on rotating circular platters. The capacity of a hard drive is usually measured in gigabytes