2. Excellence Publication Co. Ltd. Volume 1 2.31 Volume 1

3. Excellence Publication Co. Ltd. Volume 1 2.32 Keyboard Enter commands and characters, move a screen cursor or control program running. (i) QWERTY keyboard function keys special keys numeric pad

4. Excellence Publication Co. Ltd. Volume 1 2.33 (ii) Dvorak keyboard Letters are positioned for speed typing

5. Excellence Publication Co. Ltd. Volume 1 2.34 Move a mouse pointer, click or select a screen area, scroll through long documents, and even enter predefined commands. Pointing Stick Touch Pad Mouse Trackball Joystick Gamepad Move a pointer or some other display symbols in different directions.

6. Excellence Publication Co. Ltd. Volume 1 2.35 Use the light pen to select objects on a display screen. Display Screen and Light Pen Touch Screen and Stylus Use a stylus or a finger to select objects and enter data on a touch screen.

7. Excellence Publication Co. Ltd. Volume 1 2.36 Digitizer and Puck A puck is used to draw graphics on a digitizer, or act as a mouse. Voice Input Device Receive voice signals and transmit them to the computer for processing.

8. Excellence Publication Co. Ltd. Volume 1 2.37 Optical Scanner Read text or images and translate the data into digital form. (i) Overhead (ii) handheld (iii) flatbed (iv) sheet-fed

9. Excellence Publication Co. Ltd. Volume 1 2.38 Digital Camera Camcorder Record video and to generate a digital signal for display or recording. Record images in digital form.

10. Excellence Publication Co. Ltd. Volume 1 2.39 WebCam (i) home (ii) public-place Capture periodic or continuous images for display. MICR Read characters printed in magnetic ink. OCR Read an image and convert the characters in the image into a text format.

11. Excellence Publication Co. Ltd. Volume 1 2.310 Bar Code Reader Read bar codes and convert them into the ASCII or the EBCDIC. e.g. Bar cords on books or on the products sold in the supermarket. Magnetic Stripe Card Reader Read magnetic stripes adhered to cards.

12. Excellence Publication Co. Ltd. Volume 1 2.311 Smart Card Reader A smart card reader is used to read data on smart cards. An example of smart card reader There are different types of smart cards. (i) contact smart card e.g. telephone card (ii) contactless smart card e.g. Octopus card (iii) hybrid smart card e.g. student identity card (iv) combi smart card e.g. credit card

13. Excellence Publication Co. Ltd. Volume 1 2.312 There are many types of input devices nowadays. However, senses like smell still do not have input device to input the data into a computer. Try to design an input device with your classmate and discuss how it works.

14. Excellence Publication Co. Ltd. Volume 1 2.313 Back