Topic A Typical Computer System

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Form 4 Computer Studies
Topic - A Typical Computer System
Input Devices
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EDD5161R Group8 members
Kwok Ming Ying Anita (98031479)

• Collect text used in presentation

Koo Chi Kit (98032890)

• Add sound, animation and special effects

Wong Yuk Wa (98032710)

• Collect all images used in presentation

Law Ngai Tat Andrew (98032220)

• Integrate all materials to Powerpoint slides

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Target Audience

• Class - Form 4 science students
• Age/Grade - 15/Band 1
• Prior knowledge Basic knowledge experience
  in using mouse and keyboard

Other Materials

• Some concrete objects of input devices for
  demonstration

Purpose

• Lecturing

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Input Device - a piece of hardware that is used
for providing information to the computer
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Mouse

• common pointing device used with a computer
• flat bottom with one or more buttons on the top
  and a multidirectional detection device (usually
  a ball) on the bottom
• controls by moving and clicking the mouse

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Different Type of Mice
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Mouse Interface
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Trackball

• basically an inverted mouse
• the user rotates the ball itself while clicking
  nearby buttons

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Joystick and Gamepad

• a popular pointing device, used mostly for
  playing computer games

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Keyboard

• a keypad device with buttons or keys that a user
  presses to enter data characters and commands
  into a computer

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Different Type of Keyboard
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ViewCam

• capture video signal and put it directly into PC
  for editing
• can be used for video-conferencing

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Digital Camera

• after taking pictures, the user can connect the
  camera directly to a home computer, stored on
  disks, or sent to friends via electronic mail

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Pen Input

• allow users to input Chinese without using the
  tradition Chinese input method

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Light Pen

• allow users to point at the graphics on the
  display to select functions or to locate desired
  positions

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Touch Screen

• to respond when a position of the screen is
  touched by the fingers of the user

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Microphone

• transmit wave signal to computer

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Bar code reader

• read the bar codes(series of parallel vertical
  lines used to assign a unique identification code
  to an item) and the information is then
  transmitted to computer for processing

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OMR reader

• the Opitical Mark Recognition technique can read
  pencil marks registered in specified position on
  a form

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MICR reader

• use Magnetic Ink Character Recognition technique
• magnetizing the magnetic ink characters on
  documents and sensing the signal induce by each
  character as it passes a reading head
• it can only read standard MICR characters
• can process 2000 cheques per minute

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Scanner
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Quiz
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1.What kind of input device should be chosen to
manage the stock in the supermarket ?
B. Point of Sale Terminal
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2.Mr. Wong wants to edit a photo using his
computer. What input device should he choose ?
C. Image Scanner
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3.What is the standard input device in a computer
system ?
B. Keyboard
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4.What kind of input device should be used in
Video Conferencing ?
A. WebCam
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5.Which of the following is used to recognize
characters in cheque ?
D. MICR reader
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The End