2. Objectives Overview
Identify the keys and buttons commonly found on desktop computer keyboards, and describe how keyboards for mobile computers and devices differ from desktop computer keyboards
Describe different mouse types
Describe various types of touch screens and explain how a touch-sensitive pad works
Describe various types of pen input
See Page 187
for Detailed Objectives
Discovering Computers Fundamentals, 2010 Edition Chapter 5

3. Objectives Overview
Explain other types of input
Explain the characteristics of LCD monitors, LCD screens, and CRT monitors
Summarize the various types of printers
Identify the purpose and features of speakers, headphones, and ear-buds; data projectors; and interactive whiteboards
Identify input and output options for physically challenged users
See Page 187
for Detailed Objectives
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4. Discovering Computers Fundamentals, 2010 Edition Chapter 5
What Is Input?
Input is any data and instructions entered into the memory of a computer
Pages 188– 189
Figure 5-1
Discovering Computers Fundamentals, 2010 Edition Chapter 5

5. Discovering Computers Fundamentals, 2010 Edition Chapter 5
What Is Input?
An input device is any hardware component that allows users to enter data and instructions into a computer
Page 188
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6. Keyboard and Pointing Devices
A pointing device is an input device that allows a user to control a pointer on the screen
A pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device
Page 189
Discovering Computers Fundamentals, 2010 Edition Chapter 5

7. Keyboard and Pointing Devices
A keyboard is an input device that contains keys users press to enter data and instructions into a computer
Page 190
Figure 5-2
Discovering Computers Fundamentals, 2010 Edition Chapter 5

8. Keyboard and Pointing Devices
Most desktop computer keyboards have…
Between 101 and 105 keys
A numeric keypad on the right side of the keyboard
Function keys, CTRL keys, ALT keys, and arrow keys
WINDOWS key
APPLICATION key
Toggle keys
Page 190
Discovering Computers Fundamentals, 2010 Edition Chapter 5

9. Keyboard and Pointing Devices
An ergonomic keyboard has a design that reduces the chance of wrist and hand injuries
Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Ergonomics below Chapter 5
Page 190
Discovering Computers Fundamentals, 2010 Edition Chapter 5

10. Keyboard and Pointing Devices
Keyboards on mobile devices typically are smaller and/or have fewer keys
Some phones have predictive text input, which saves time when entering text using the phone’s keypad
Page 191
Figure 5-3
Discovering Computers Fundamentals, 2010 Edition Chapter 5

11. Keyboard and Pointing Devices
A mouse is a pointing device that fits under the palm of your hand comfortably
Most widely used pointing device on desktop computers
A mouse can be wired or wireless
Pages 191 – 192
Figure 5-4
Discovering Computers Fundamentals, 2010 Edition Chapter 5

12. Keyboard and Pointing Devices
Trackball
A trackball is a stationary pointing device with a ball on its top or side
Touchpad
A touchpad is a small, flat, rectangular pointing device that is sensitive to pressure and motion
Pointing Stick
A pointing stick is a pressure-sensitive pointing device shaped like a pencil eraser that is positioned between keys on a keyboard
Page 192
Figures 5-5 – 5-7
Discovering Computers Fundamentals, 2010 Edition Chapter 5

13. Touch Screens and Touch-Sensitive Pads
A touch screen is a touch-sensitive display device
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Multi-Touch Screens below Chapter 5
Page 193
Figure 5-8
Discovering Computers Fundamentals, 2010 Edition Chapter 5

14. Touch Screens and Touch-Sensitive Pads
Microsoft Surface
Touch-sensitive pads
Page 193
Figures 5-9 – 5-10
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15. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Pen Input
With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections
Page 194
Figure 5-11
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16. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Page 195
Figure 5-12
Discovering Computers Fundamentals, 2010 Edition Chapter 5

17. Other Types of Input
Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects
Gamepads
Joysticks and Wheels
Light guns
Dance pads
Motion-sensing controllers
Wii Remote
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Wii Remote below Chapter 5
Pages
Discovering Computers Fundamentals, 2010 Edition Chapter 5

18. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Page 196
Figure 5-13
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19. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
A digital camera is a mobile device that allows users to take pictures and store them digitally
Studio cameras
Field cameras
Point-and-shoot camera
Page 197
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20. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Page 197
Figure 5-14
Discovering Computers Fundamentals, 2010 Edition Chapter 5

21. Other Types of Input
Two factors affect the quality of digital camera photos:
Resolution
Resolution is the number of horizontal and vertical pictures in a display device
A pixel is the smallest element in an electronic display
Number of bits stored in each pixel
Each pixel consists of one or more bits of data
The more bits used to represent a pixel, the more colors and shades of gray that can be represented
Page 198
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22. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Voice input is the process of entering input by speaking into a microphone
Voice recognition is the computer’s capability of distinguishing spoken words
Audio input is the process of entering any sound into the computer
Page 198
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23. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Music production software allows users to record, compose, mix, and edit music and sounds
Page 198
Figure 5-15
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24. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Video input is the process of capturing full-motion images and storing them on a computer’s storage medium
Record video on a digital video (DV) camera or use a video capture card to convert analog signals to digital
Connect the camera to a port on the system unit
Transfer video and images
Page 199
Discovering Computers Fundamentals, 2010 Edition Chapter 5

25. Video: Video Editing on Your Computer
CLICK TO START
Discovering Computers Fundamentals, 2010 Edition Chapter 5

26. Other Types of Input
A Web cam is a type of digital video camera that enables a user to:
Capture video and still images
Send messages with video attachments
Add live images to instant messages
Broadcast live images over the Internet
Make video telephone calls
Page 199
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27. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
A video conference is a meeting between two or more geographically separated people
Page 199
Figures 5-16 – 5-17
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28. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
A flatbed scanner creates a file of the document in memory
Works in a manner similar to a copy machine
Page 200
Figure 5-18
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29. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Optical character recognition (OCR) involves reading characters from ordinary documents
A turnaround document is a document you return to the company that creates and sends it
Page 200
Figure 5-19
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30. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles
An OMR device scans the documents and matches the patterns of light
Page 200
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31. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
A bar code reader, also called a bar code scanner uses laser beams to read bar codes
Page 201
Figure 5-20
Discovering Computers Fundamentals, 2010 Edition Chapter 5

32. Other Types of Input
RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object
An RFID reader reads information on the tag via radio waves
RFID can track:
Inventory
Location of soldiers
Employee wardrobes
Airline baggage
Gauging tire pressure and temperature
Library books
Prepaid tolls
Page 201
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33. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
Magnetic stripe card readers read the magnetic stripe on the back of cards such as:
Credit cards
Entertainment cards
Bank cards
Other similar cards
Pages
Figure 5-22
Discovering Computers Fundamentals, 2010 Edition Chapter 5

34. Discovering Computers Fundamentals, 2010 Edition Chapter 5
Other Types of Input
MICR (magnetic ink character recognition) devices read text printed with magnetized ink
An MICR reader converts MICR characters into a form the computer can process
Banking industry uses MICR for check processing
Page 202
Figure 5-23
Discovering Computers Fundamentals, 2010 Edition Chapter 5

35. Other Types of Input
Biometrics authenticates a person’s identity by verifying a personal characteristic
Fingerprint reader
Face recognition system
Hand geometry system
Voice verification system
Signature verification system
Iris recognition system
Retinal scanners
Pages
Discovering Computers Fundamentals, 2010 Edition Chapter 5

36. Other Types of Input iris recognition system fingerprint reader
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Biometric Input
below Chapter 5
Pages 202 – 203
Figures 5-24 – 5-25
Discovering Computers Fundamentals, 2010 Edition Chapter 5

37. Other Types of Input
A terminal is a computer that allows users to send data to and/or receive information from a host computer
A POS terminal records purchases, processes payment, and updates inventory
An automated teller machine (ATM) allows users to access their bank accounts
A DVD kiosk is a self-service DVD rental machine
Pages 204 – 205
Figures 5-26 – 5-28
Discovering Computers Fundamentals, 2010 Edition Chapter 5

38. Discovering Computers 2010: Living in a Digital World Chapter 6
What Is Output?
Output is data that has been processed into a useful form
Pages 206 – 207
Figure 5-29
Discovering Computers 2010: Living in a Digital World Chapter 6

39. What Is Output?
An output device is any type of hardware component that conveys information to one or more people
Display devices
Printers
Speakers, headphones, and earbuds
Data projectors
Interactive whiteboards
Page 206
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40. Discovering Computers 2010: Living in a Digital World Chapter 6
Display Devices
A display device visually conveys text, graphics, and video information
A monitor is packaged as a separate peripheral
LCD monitor
Widescreen
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Widescreen LCD Monitors below Chapter 5
Pages 207 – 208
Figure 5-30
Discovering Computers 2010: Living in a Digital World Chapter 6

41. Discovering Computers 2010: Living in a Digital World Chapter 6
Display Devices
Liquid crystal display (LCD) uses a liquid compound to present information on a display device
Resolution
Response time
Brightness
Dot pitch
Contrast ratio
Page 209
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42. Discovering Computers 2010: Living in a Digital World Chapter 6
Display Devices
Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches
Page 210
Figure 5-32
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43. Discovering Computers 2010: Living in a Digital World Chapter 6
Display Devices
A CRT monitor is a desktop monitor that contains a cathode-ray tube
Have a much larger footprint than do LCD monitors
Page 210
Figure 5-33
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44. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
A printer produces text and graphics on a physical medium
Before purchasing a printer, ask yourself a series of questions
Page 211
Figure 5-34
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45. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
Page 212
Figure 5-35
Discovering Computers 2010: Living in a Digital World Chapter 6

46. Printers
A nonimpact printer forms characters and graphics on a piece of paper without actually striking the paper
Ink-jet printers
Photo printers
Laser printers
Thermal printers
Mobile printers
Plotters
Large-format printers
Page 213
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47. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper
Color or black-and-white
Printers with a higher dpi (dots per inch) produce a higher quality output
Page 213
Figure 5-36
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48. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
A photo printer produces color photo-lab-quality pictures
Most use ink-jet technology
PictBridge allows you to print photos directly from a digital camera
Print from a memory card and preview photos on a built-in LCD screen
Page 214
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49. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Photo Printers below Chapter 5
Page 214
Figure 5-37
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50. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
Laser printer
High-speed
High-quality
Color
Black-and-white
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Laser Printers below Chapter 5
Pages 214 – 215
Figure 5-38
Discovering Computers 2010: Living in a Digital World Chapter 6

51. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
A multifunction peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes
Sometimes called an all-in-one device
Page 215
Figure 5-39
Discovering Computers 2010: Living in a Digital World Chapter 6

52. Printers
A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper
Thermal wax-transfer printer
Dye-sublimation printer
Pages 215 – 216
Figure 5-40
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53. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a mobile device
Page 216
Figure 5-41
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54. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
Plotters are used to produce high-quality drawings
Large-format printers create photo-realistic quality color prints on a larger scale
Page 216
Figure 5-42
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55. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper
Dot-matrix printer
Line printer
Page 217
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56. Discovering Computers 2010: Living in a Digital World Chapter 6
Printers
A dot-matrix printer produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon
A line printer prints an entire line at a time
Page 217
Figure 5-43
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57. Discovering Computers 2010: Living in a Digital World Chapter 6
Other Output Devices
An audio output device produces music, speech, or other sounds
Most computer users attach speakers to their computers to:
Generate higher-quality sounds for playing games
Interact with multimedia presentations
Listen to music
View movies
Page 217
Figure 5-44
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58. Discovering Computers 2010: Living in a Digital World Chapter 6
Other Output Devices
Headphones are speakers that cover your head or are placed outside of the ear
Earbuds (also called earphones) rest inside the ear canal
Click to view Web Link, click Chapter 5, Click Web Link from left navigation,
then click Earbuds below Chapter 5
Page 218
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59. Discovering Computers 2010: Living in a Digital World Chapter 6
Other Output Devices
Voice output occurs when you hear a person’s voice or when the computer talks to you through the speakers
Some Web sites dedicate themselves to providing voice output
Often works with voice input
VoIP uses voice output and voice input
Page 218
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60. Discovering Computers 2010: Living in a Digital World Chapter 6
Other Output Devices
A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen
Digital light processing (DLP) projector
Page 218
Figure 5-45
Discovering Computers 2010: Living in a Digital World Chapter 6

61. Putting It All Together
Page 219
Figure 5-47
Discovering Computers 2010: Living in a Digital World Chapter 6

62. Putting It All Together
Page 219
Figure 5-47
Discovering Computers 2010: Living in a Digital World Chapter 6

63. Putting It All Together
Page 219
Figure 5-47
Discovering Computers 2010: Living in a Digital World Chapter 6

64. Input and Output Devices for Physically Challenged Users
Head-mounted pointer
Braille printer
Pages 220 – 221
Figures 5-47 – 5-48
Discovering Computers Fundamentals, 2010 Edition Chapter 5

65. Summary
Various techniques for entering input and several commonly used input device
Various methods of output and several commonly used output devices
Page 222
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66. Chapter 5 Complete