How It All WorksThis diagram describes the events that take place when you double click on an icon to open a program.

This diagram describe the events that take place when you type the letter ‘E’ on the keyboard when you want to go onto a new line in a WORD document.

1. Instruction to open program sent to the CPU.

2. CPU sends request for program to be loaded from hard drive onto the RAM.

3. Hard drive loads program onto the RAM.

4. CPU now ready to work with the program!

1. Instruction to display letter is sent to the CPU.

2. CPU asks RAM for instructions on how to display a letter.

3. RAM sends program instructions onto CPU.

4. CPU instructs Monitor to display a letter on the screen.