Chapter 5 Input and Output

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Chapter 5Input and Output
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Today

• We will be discussing
• 23 different types of input devices
• 10 output devices
• 5 combined devices
• How many can you name?

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What Is Input?

• What is input?

• Data or instructions entered into the memory of
  computer

• Input device is any hardware component used to
  enter data or instructions into a computer

p. 166 Fig. 5-1
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Keyboard and Pointing Devices

• 1) What is a keyboard?

• Input device that contains keys users press to
  enter data into a computer

• Includes typing area, numeric keypad, and
  function keys

• Can be cordless or built-in

p. 168 Fig. 5-2
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Keyboard and Pointing Devices

• What is a mouse?

• Pointing device that fits under the palm of your
  hand

• Pointing device controls movement of pointer,
  also called the pointer

• 2) Mechanical mouse has rubber or metal ball on
  its underside

p. 169 Fig. 5-3a
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Keyboard and Pointing Devices

• 3) What is an optical mouse?

• No moving mechanical parts inside
• Senses light to detect mouses movement
• More precise than mechanical mouse
• More expensive than a mechanical mouse

p. 169 Fig. 5-3b
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Keyboard and Pointing Devices

• 4) What is a trackball?

• Stationary pointing device with a ball on its top
  or side
• To move pointer, rotate ball with thumb, fingers,
  or palm of hand

p. 170 Fig. 5-4
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Keyboard and Pointing Devices

• What are a touchpad and a pointing stick?

• 5) Touchpad is small, flat, rectangular pointing
  device sensitive to pressure and motion

• 6) Pointing stick is pointing device shaped like
  pencil eraser positioned between keys on keyboard

p. 170 Figs. 5-55-6
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Keyboard and Pointing Devices

• What are a joystick and a wheel?

• 7) Joystick is vertical lever mounted on a base
• 8) Wheel is steering-wheel-type input device
• Pedal simulates car brakes and accelerator

p. 171 Fig. 5-7
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Keyboard and Pointing Devices

• 9) What is a light pen?

• Handheld input device that can detect the
  presence of light
• Press light pen against screen surface and then
  press button on pen

p. 171 Fig. 5-8
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Keyboard and Pointing Devices

• 10) What is a touch screen?

• Touch areas of screen with finger

• Often used with kiosks

p. 171 Fig. 5-9
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Keyboard and Pointing Devices

• 11) What is a stylus and a digital pen?

• Looks like a ballpoint pen, but uses pressure to
  write text and draw lines

• Used with graphics tablets, flat electronic boards

p. 172 Fig. 5-10
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Other Input Devices

• What is voice input?
• 12) Entering data by speaking into a microphone
• Voice recognition or speech recognition is
  thecomputers capability to distinguish spoken
  words

p. 173
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Other Input Devices

• What is audio input?
• 13) Entering sounds into a computer -
  speech,music, and sound effects using the
  electronic keyboard
• MIDI - standard defining how digital
  musicaldevices represent sound electronically

p. 173 Fig. 5-13
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Other Input Devices

• 14) What is a digital camera?

• Allows you to take digital pictures

• Images viewable immediately on camera
• Download to computer
• Post pictures to Web

p. 175 Fig. 5-16
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Other Input Devices

• 15, 16)What are a PC video camera and a Web cam?

• PC video cameraccDV camera used to capture video
  and still images, and to make video telephone
  calls on Internet
• Also called PC camera
• Web camccvideo camera that displays its output
  on a Web page

p. 176 Fig. 5-17
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Other Input Devices

• What is video conferencing?

• Two or more geographically separated people who
  use network on Internet to transmit audio and
  video data

p. 176 Fig. 5-18
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Other Input Devices

• 17) What is a scanner?

• Light-sensing device that reads printed text and
  graphics
• Used for image processing, converting paper
  documents into electronic images

p. 177 Fig. 5-19
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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

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

p. 177 Fig. 5-21
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Other Input Devices

• What is a turnaround document?

• Document that you return to the company that sent
  it
• Portion you return has information printed in OCR
  characters

p. 177 Fig. 5-20
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Other Input Devices

• 21) 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

p. 179 Fig. 5-23
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Other Input Devices
22) 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

p. 179 Fig. 5-24
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Other Input Devices

• What is biometrics?

• Authenticates persons identity by verifying a
  personal characteristic

• 23) Fingerprint scanner captures curves and
  indentations of fingerprint

p. 181 Fig. 5-27
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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

p. 181 Fig. 5-28
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New input devices called Internet wearables or
smart clothing.

• It is predicted that in 10 years, people will be
  able to wear Internet devices.
• Small input devices Hewlett-Packard is developing
  that use Internet technology to monitor blood
  sugar and cholesterol.
• Researchers at MIT have introduced an input
  device that looks like a brooch and, in
  conjunction with the Internet, someday will be
  able to monitor heart rate and body temperature.
• Uniforms with sewn-in sensors that report the
  location and condition of wounded soldiers.
• Hearing aids that let business people tap into
  and receive information from company intranets.
• Glasses that allow wearers to access and view
  pages on the World Wide Web.
• How do you feel about this technology?

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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

p. 182 Fig. 5-29
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Today

• Name the output devices you have used.

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Display Devices

• 1) 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

p. 184 Fig. 5-30
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Display Devices

• 2) 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

p. 185 Fig. 5-32
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Display Devices

• 3) 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

p. 186 Fig. 5-33
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Printers

• What is a nonimpact printer?

• Forms characters and graphics without striking
  paper

• 4) Ink-jet printer sprays tiny drops of liquid
  ink onto paper
• Prints in black-and-white or color on a variety
  of paper types

p. 189 Fig. 5-36
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Printers

• 5) What is a photo printer?

• Color printer that produces photo-lab-quality
  pictures
• Many photo printers have a built-in card slot

p. 190 Fig. 5-37
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Printers

• 6) What is a laser printer?

• High-speed, high-quality nonimpact printer

• Prints text and graphics in very high-quality
  resolution, ranging from 1,200 to 2,400 dpi
• Typically costs more than ink-jet printer, but
  is much faster

p. 190 Fig. 5-38
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Printers

• 7) What is a plotter?

• Sophisticated printer used to produce
  high-quality drawings
• Large-format printer creates photo-realistic-quali
  tycolor prints

p. 192 Fig. 5-41
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Other Output Devices

• What is an audio output device?

• Computer component that produces music, speech,
  or other sounds

• 8,9) Speakers and headsets are common devices

p. 193 Fig. 5-43
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Other Output Devices

• 10) What is a data projector?

• Device that takes image from computer screen and
  projects it onto larger screen

p. 195 Fig. 5-46
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Combined Input and output devices

• How many can you name?

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Combined Input and Output Devices

• 1) What is a smart phone?

• Users can input and send text messages, graphics,
  pictures, video clips, and sound files

p. 175
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Combined Input and Output Devices

• 2) What is a facsimile (fax) machine?

• Device that transmits and receives documents over
  telephone lines

What is a fax modem?

• Modem that allows you to send and receive
  electronic documents as faxes

p. 194 Fig. 5-44
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Combined Input and Output Devices

• 3) What is a multifunction peripheral?

• Provides functionality of printer, scanner,
  copy machine, and fax machine

p. 194 Fig. 5-45
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Combined Input and Output Devices

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

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

p. 180 Fig. 5-25
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Combined Input and Output Devices

• 5) What is an automated teller machine (ATM)?

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

p. 180 Fig. 5-26
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• The Bureau of Labor Statistics reports that
  work-related musculoskeletal disorders (MSDs)
  account for one-third of all occupational
  injuries and illnesses. These disorders are the
  largest job-related injury and illness problem in
  the United States today.
• Whose responsibility is safe computer usage the
  employee or the employer?

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Analysts predict electronic books will
revolutionize the publishing industry. An
electronic book primarily is a digital storage
and display unit. Some plug into a cradle that
attaches to your computer, letting you download
textbooks or novels from Web-based publishers.
Others include a built-in modem that allows you
to connect directly to the Internet. They range
in size and weight from a paperback to a
two-pound textbook and can hold thousands of
pages or the equivalent of ten or more books.
Keeping with some traits of traditional books,
you can move forward or backward one page at a
time, or use a stylus to write notes in the
margin. What is your opinion of the electronic
book? Will it replace the printed book? Why not
just buy the book? Does society have a place for
the electronic book? Who do you think will use
electronic books and how will they use them?

• Analysts predict electronic books will
  revolutionize the publishing industry. An
  electronic book primarily is a digital storage
  and display unit. They range in size and weight
  from a paperback to a two-pound textbook and can
  hold thousands of pages or the equivalent of ten
  or more books. You can move forward or backward
  one page at a time, or use a stylus to write
  notes in the margin.
• What is your opinion of the electronic book?
• Will it replace the printed book? Why not just
  buy the book?
• Does society have a place for the electronic
  book?
• Who do you think will use electronic books and
  how will they use them?

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• Although input varies, in one way input devices
  do not most are encased in a bland, beige,
  plastic shell. A California company is changing
  that by offering keyboards and mice in oak,
  cherry, or maple. Upgrading appearance is not
  cheap. A wooden keyboard costs more than 600, a
  wooden mouse more than 300. Some people insist
  these devices make for a more attractive and, in
  the long run, more productive work setting.
• How much money would you spend to upgrade the
  appearance of your computer equipment? Why?
• Would this kind of upgrade increase productivity?
  Why or why not?