Differences, why we need them and how they work



ROM is a type of storage medium that permanently stores data on personal computers.

What ROM does-

ROM is a storage device that keeps its memory even when the computer is turned off. So if you turned your computer off, ROM would remember the instructions to start it up again when turned on.

How it works-



Is the place in a computer where the operating system application programs, and data in current use are kept so that they can be reached by the computer's processor.

What RAM does-

It stores things so you can quickly retrieve them again.

How it works-

When your computer turns on, what it needs to run your programs is moved to RAM. When you are finished with an application, and you close the program, then it is cleaned from RAM so it makes space for other applications. (but it stays on your hard drive.)