COMPUTER SYSTEM (INPUT DEVICE)

1. CHAPTER 2

2. Input Device?

2.1. Any hardware component allows users to enter data and instructions into acomputer

3. Keyboard

3.1. example:

3.2. Desktop computer keyboard

3.3. Keyboard ergonomics

3.4. function

3.5. contains keys users press

4. DIGITAL CAMERA

4.1. allow user to take pictures and sotre digitally

5. READING DEVICE

5.1. EXAMPLE

5.2. optical character recognition(OCR)

5.2.1. funtion

5.2.1.1. read character from ordinary documents

5.3. Barcode reader

5.3.1. function

5.3.1.1. rallows user read barcode using laser beam

6. TERMINAL

6.1. EXAMPLE

6.2. DVD kiosk

6.3. post terminal

6.4. function

6.5. allow user to send data to/or receive information from a host computer

7. POINTING DEVICE

7.1. example:

7.2. mouse

7.2.1. fits under the palm

7.3. trackball

7.3.1. ball on its top

7.4. touchpad

7.4.1. sensetive to pressure and motion

7.5. function

7.6. control a pointer on the screen

8. MICROPHONE

8.1. allow user to speak into the computer

9. WEBCAM

9.1. Allow user to capture video and images

10. TOUCH SCREEN

10.1. Sensetive to pressure,touch pictures or word on the screen