what you need to know!
1,000 bytes=1 kilobyte (K or KB)
1,000 KB=1 megabyte (MB)
1,000 MB=1 gigabyte (GB)
1,000 GB=1 Terabyte (TB)
CPU stands for central processing unit, and is usually used to describe the brain of the computer. Any tasks that you do on the computer has to go through CPU. It processes what you want and then gives you the results.
For example, if you want to type a letter on the screen it will go through CPU, then the letter will appear on the screen.