1. The computer system By Amy & Sehar

3. Hardware Software Hardware: All the physical parts of the computer system (the parts that you can see or touch) Software : Is a collection of programmes that help the compute hardware to work properly.

4. 5 box diagram Backing storage devices. Input device Processor CPU Output devices Main memory RAM & ROM

5. Input Output

6. Backing storage We require backing storage to store programs and files. Without backing storage all our data would be lost when we turn the computer off.

7. The processor C ontrol U nit, A rithmetic L ogic U nit, R egister CU ALU R

8. RAM ROM R andom A ccess M emory. This is where information is stored temporarily while the computer is on although this is lost when the computer is switched off! R ead O nly M emory . This is where data and programs are stored permanently.

9. Different computers palmtop  Apple  Desktop pc laptop HP

10. The End