All components required for the system to function are plugged in the CPU

RAM is Read only memory

RAM is used to store the data the user is currently working on.

RAM holds the ‘boot up’ instructions to start the computer.

In RAM contents are lost when the computer is turned off.

ROM is used to store the BIOS (basic input/output system.

We can read and edit in ROM.

RAM is not volatile.

The data in ROM is easier to change than the data in RAM.

RAM loads Operating Systems.

used to temporarily store information that is currently in use by the computer. This can include anything from word documents to videos.

used to permanently store instructions that tell the computer how to boot (startup). It also loads the operating system (e.g. Windows).