The document describes several common input and output devices for computers. It discusses traditional mice that use a rolling ball, optical mice that avoid ball cleaning issues, and wireless mice that communicate via Bluetooth. Touchpads are described as pointing devices commonly found in laptops as mouse substitutes. Touchscreens are highlighted as intuitive interfaces used for touch selection in devices like kiosks and ATMs. Additional devices mentioned include trackpoints, trackball mice, light pens, and joysticks.

1. Input/Output Devices

2. Keyboard 08/21/10 PCTE, Baddowal

3. 2 button Mouse with scroll wheel 08/21/10 PCTE, Baddowal

4. 2 Button Mouse with scroll wheel A ball in the bottom of the mouse rolls on the surface as you move the mouse. Internal rollers sense the ball movement and transmit the information to computer via the cord of the mouse. If the ball is dirty, mouse does not roll smoothly. 08/21/10 PCTE, Baddowal

5. Optical Mouse 08/21/10 PCTE, Baddowal

6. Optical Mouse Does not use rolling ball. Uses light and a small optical sensor, which detects the motion of the mouse. Problem of dirty mouse ball is avoided by using optical mouse. 08/21/10 PCTE, Baddowal

7. Wireless Mouse 08/21/10 PCTE, Baddowal

8. Wireless Mouse Communicates through Bluetooth mostly. Needs external batteries. 08/21/10 PCTE, Baddowal

9. Touchpad of a Laptop Computer 08/21/10 PCTE, Baddowal

10. Touchpad Its a pointing device. It consists of a special surface which translates the motion & position of user’s fingers to a relative position on the screen. Commonly used in laptops as a substitute for a mouse. Also used in PDAs. 08/21/10 PCTE, Baddowal

11. Touchscreen Most simple, intuitive, and easiest to learn of all input devices. Enables users to choose from available options by simply touching with their finger the desired icon or menu item displayed on the screen. 08/21/10 PCTE, Baddowal

12. Touchscreen Most preferred human-computer interface used in information kiosks and ATMs. 08/21/10 PCTE, Baddowal

13. Mobile with Touch screen and QWERTY keyboard 08/21/10 PCTE, Baddowal

14. Touch screen ATM 08/21/10 PCTE, Baddowal

15. Trackpoint 08/21/10 PCTE, Baddowal

16. Trackball Mouse 08/21/10 PCTE, Baddowal

17. Trackball in a laptop 08/21/10 PCTE, Baddowal

18. Joystick 08/21/10 PCTE, Baddowal

19. Light Pen 08/21/10 PCTE, Baddowal