How to understand computer memory

What is RAM? RAM stands for random access memory, it is used as a temporary store of data so they can be retrieved quickly if needed.

When software applications load, the program gets copied from the hard disk to RAM. The program travels to the processor at a high speed. RAM is made from a microchip,so stores data electronically.

We need ROM (read only memory) because it can input data, store the data, process the data, and you can output the data. ROM is permanent and non-volatile memory. so we can boot up a computer system.

All modern computer systems have a ROM chip which is pre-written in the factory. beep. The whole system works because of ROM, without it, all computers wont work, And this is why we need ROM.

The more programs you have open at once, the more RAM is used. So we need Virtual memory. It is when we use some of the storage area on the hard drive to ‘pretend’memory space.

Memory can be divided into small sized chunks called pages. We store some pages in virtual memory. If to many pages that aren’t currently needed that aren't being used virtual memory frees up space.