CGS 1000

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CGS 1000

• Introduction to Computers and Technology
• Fall 2006

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Topics

• Quiz
• Chapter 5
• Class Activity Ex 73 to Ex 88

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Topics Covered

• Chapter 5 Objectives
• Defined Input
• Discussed about
• Keyboard
• Mouse
• Voice Input
• Touch Screen
• Voice input
• Digital Cameras

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Chapter 5Input and Output
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Other Input Devices

• What is an optical reader?

• Device that uses light source to read characters,
  marks, and codes and then converts them into
  digital data

• Optical character recognition (OCR) reads
  characters in OCR font
• Optical mark recognition (OMR) reads hand-drawn
  pencil marks, such as small circles
• Bar code reader

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Other Input Devices

• What is an RFID reader?

• Reads information on the tag via radio waves
• Can be handheld devices or mounted in a
  stationary object

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Other Input Devices

• What is a magnetic stripe card reader?

• Reads the magnetic stripe on the back of a credit
  card
• Exposure to a magnetic field can erase the
  contents of a cards magnetic stripe

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Other Input Devices
What is a magnetic-ink character recognition
(MICR) reader?

• Can read text printed with magnetized ink
• Banking industry almost exclusively uses MICR for
  check processing

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Other Input Devices

• What is a point of sale (POS) terminal?

• Records purchases, processes credit or debit
  cards, and updates inventory

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Other Input Devices

• What is an automated teller machine (ATM)?

• Self-service banking machine that connects to a
  host computer through a network

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Other Input Devices

• What is biometrics?

• Authenticates persons identity by verifying a
  personal characteristic

• Fingerprint scanner captures curves and
  indentations of fingerprint

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Other Input Devices

• What are examples of biometric technology?

• Voice verification system compares live speech
  with stored voice pattern

• Signature verification system recognizes shape
  of signature

• Iris recognition system reads patterns in blood
  vessels in back of eye

• Biometric data is sometimes stored on smart card,
  which stores personal data on microprocessor
  embedded in card

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What is Output?

• What is output?

• Data that has been processed into a useful
  form,called information

• Output device is any hardware component that can
  convey information to one or more people

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Display Devices

• What is a display device?

• Output device that visually conveys information
• Information on display device sometimes called
  soft copy
• Monitor houses display device as separate
  peripheral

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Display Devices

• What is an LCD monitor?

• Uses liquid crystal display
• Have a small footprint
• Mobile devices that contain LCD displays include
• Notebook computer, Tablet PC, PDA, and Smart Phone

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Display Devices

• What is a plasma monitor?

• Displays image by applying voltage to layer of
  gas
• Larger screen size and higher display quality
  than LCD, but are more expensive

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Display Devices

• What is a CRT monitor?

• Contains cathode-ray tube (CRT)
• Common sizes are 15, 17, 19, 21, and 22 inches
• Viewable size is diagonal measurement of actual
  viewing area

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Display Devices

• What determines the quality of a CRT monitor?

• Screen resolution
• Text created with a smaller dot pitch is
  easierto read
• Refresh rate is speed at which monitor
  redrawsimages on screen

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Questions?