1. Unit 1
Chapter 3 : Hardware

2. Hardware
Hardware : Is any part we can touch.

3. Computer Processor Computer hardware consists of 5 main parts: Memory
Input units
Output units
Storage devices

4. 1- Computer Processor Computer Processor
It is hidden inside the system unit.
Processor is the main part of the computer.
Known as the Central Processing Unit (CPU).
Responsible for data processing.

5. 2- Computer Memory Computer Memory
A RAM is a computer’s temporary storage place.
The amount of RAM is very important factor in a computer’s performance.
Ram loses it’s data when electricity cut off.

6. 3- Input units
Input units
Entering data into computer.

7. Input units examples Keyboard
Used to enter data . orders . select menu and enter data into applications.

8. Input units examples Mouse
Used in Pointing , selecting , drag and drop and open drop down menu.

9. Input units examples Light pen
Draw directly onto the screen & doing same mouse functions.

10. Input units examples Touch screen
Similar to an ordinary computer monitor. As (ATM) in banks.

11. Input units examples
Joystick
Used mainly for playing games.

12. Input units examples
Touchpad
Used in laptops instead of mouse.

13. Input units examples
Trackball
Used instead of mouse.

14. Input units examples Graphics pad
Using to draw pictures, as complicated lines and shapes

15. Input units examples Scanner
Used to scan (enter) Images into a computer.

16. 4- Output units
Output units
Output data from computer.

17. Output units examples Monitor
Displays the current process or application.

18. Output units examples Laser Printer
Large, Expensive , high quality printouts and very fast.

19. Output units examples Ink jet Printer
Small , cheaper , slower and spray a jet of ink onto the paper

20. Output units examples Plotter
A special type of printers that draw pictures based in commands from computers.

21. 5- Storage Devices A PC processes data in streams of bits.

22. Storage Devices examples
Zip disks
Can store 100 to 250 (MB).

23. Storage Devices examples
Jaz drives
Can store 1 to 2 (GB).

24. Storage Devices examples
A tap drive
Create files backups.

25. Storage Devices examples
Flash Cards
Very common use in our live. Move data anywhere.

26. Storage Devices examples
Hard disk
Is the main storage device in our computers.

27. Storage Devices examples
CD- Rom disks
Can hold more than 600 (MB).

28. Storage Devices examples
DVD
Can hold more than 4.7 (GB).

29. Storage Devices examples
Floppy Disk
Can only store 1.44 (MB)

30. What makes a computer powerful?
1- Processor speed
2- Reliability
3- Hard disk
4- Memory