1. Computer Studies Today Chapter 17 1 Chapter 17

2. Computer Studies Today Chapter 17 2 »Input devices and output devices (I/O devices) are known as peripherals. »Peripherals are devices that surround the system unit. »Other examples of peripherals are secondary storage and communication devices.

3. Computer Studies Today Chapter 17 3 »Users enter data by pressing the corresponding keys on the keyboard. »It is suitable for typing text.

4. Computer Studies Today Chapter 17 4

5. 5 Mouse »A mouse is suitable for graphic input and selection of actions in the windows environment.

6. Computer Studies Today Chapter 17 6 Top view of a typical mouse. Bottom view of a typical mouse.

7. Computer Studies Today Chapter 17 7 Trackball »A trackball is like an upside-down mouse.

8. Computer Studies Today Chapter 17 8 Joystick »A joystick is suitable for playing video games.

9. Computer Studies Today Chapter 17 9 Touch Screen »Touch screen is commonly used in public services such as information seeking.

10. Computer Studies Today Chapter 17 10 Digitiser »A digitiser can be used to trace or copy a drawing or photograph.

11. Computer Studies Today Chapter 17 11 Graphic Tablet »A graphic tablet is used to input graphic designs into the computer.

12. Computer Studies Today Chapter 17 12 Bar Code Reader »A bar code reader is a photoelectric scanner that reads bar codes printed on product containers.

13. Computer Studies Today Chapter 17 13

14. Computer Studies Today Chapter 17 14 Optical Character Reader (OCR) »An OCR can recognise characters with special typefaces. OCR typeface A retail price tag is read by an optical character reader.

15. Computer Studies Today Chapter 17 15 Image Scanner »An image scanner captures images or text onto the computer.

16. Computer Studies Today Chapter 17 16 Magnetic Strip Card Reader »Magnetic strip card reader reads data stored in the magnetic strip on magnetic strip cards such as credit cards.

17. Computer Studies Today Chapter 17 17 Smart Card Reader »Smart card reader reads data stored in the chips or the magnetic substances on a smart card such as Octopus tickets.

18. Computer Studies Today Chapter 17 18 Voice-input Device »Voice-input device accepts the spoken words through a microphone and digitise them so that they can be processed by the computer.

19. Computer Studies Today Chapter 17 19 A voice-input device: dictating a letter

20. Computer Studies Today Chapter 17 20 Digital Cameras »Digital cameras record images in the form of digital data in the camera’s memory rather than on film.

21. Computer Studies Today Chapter 17 21 Digital Video Cameras »Digital video cameras allow users to input video images into the computer in digital form.