2. Chapter 1
Our Digital World

3. Presentation Overview
Immersed in Digital Technology
The Computer Advantage
How Computers Work
Computers and Computer Systems
Components of a Computer System
Categories of Computers

4. Immersed in Digital Technology

5. Immersed in Digital Technology
refers to an electronic signal that is processed, sent, and stored as bits

6. Immersed in Digital Technology
refers to an electronic signal that is processed, sent, and stored as bits
bits are represented by “on” and “off” states

7. Immersed in Digital Technology
How has digital technology infiltrated your daily life?

8. Immersed in Digital Technology
How has digital technology infiltrated your daily life?
Computer technology powers HDTVs, VCRs, microwave ovens, watches, cell phones, and automobiles.

9. Immersed in Digital Technology
How has digital technology infiltrated your daily life?
Computer technology powers HDTVs, VCRs, microwave ovens, watches, cell phones, and automobiles.
Embedded chips, computers, networks, and the Internet and WWW enable us to communicate globally.

10. Immersed in Digital Technology
Computerized devices
have embedded computers to perform a few specific actions

11. Immersed in Digital Technology
A computer is an electronic device that

12. Immersed in Digital Technology
A computer is an electronic device that
operates under a set of instructions

13. Immersed in Digital Technology
A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies

14. Immersed in Digital Technology
A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
manipulates data according to a program

15. Immersed in Digital Technology
A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
manipulates data according to a program
produces results

16. Immersed in Digital Technology
A computer is an electronic device that
operates under a set of instructions
accepts data that user supplies
manipulates data according to a program
produces results
stores the results

17. The Computer Advantage Speed

18. The Computer Advantage Speed
Computers operate with lightning-like speed.

19. The Computer Advantage Speed
Computers operate with lightning-like speed.
PCs execute billions of program instructions in one second.

20. The Computer Advantage Speed
Computers operate with lightning-like speed.
PCs execute billions of program instructions in one second.
Supercomputers execute trillions of instructions per second, the kind of processing required to forecast the weather and monitor space shuttle flights.

21. The Computer Advantage Accuracy

22. The Computer Advantage Accuracy
Computers are accurate when accurate programs and data are entered.

23. The Computer Advantage Accuracy
Computers are accurate when accurate programs and data are entered.
If inaccurate programs and/or data are entered (garbage in), the output will also be inaccurate (garbage out) – GIGO.

24. The Computer Advantage Versatility

25. The Computer Advantage Versatility
Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.

26. The Computer Advantage Versatility
Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.
Universities, government agencies, hospitals, and scientific organizations conduct life-enhancing research using computers.

27. The Computer Advantage Versatility
Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.
Universities, government agencies, hospitals, and scientific organizations conduct life-enhancing research using computers.
Banks conduct money transfers, account withdrawals, and payment of checks via computer.

28. The Computer Advantage Versatility
Retailers process sales transactions and check availability of products.

29. The Computer Advantage Versatility
Retailers process sales transactions and check availability of products.
Manufacturers manage their entire production, warehousing, and selling processes.

30. The Computer Advantage Versatility
Retailers process sales transactions and check availability of products.
Manufacturers manage their entire production, warehousing, and selling processes.
Schools keep records, conduct distance-learning classes, schedule events, and analyze budgets.

31. The Computer Advantage Storage

32. The Computer Advantage Storage
Computers accept and store programs and data.

33. The Computer Advantage Storage
Computers accept and store programs and data.
Users can access a program again and again to process different data.

34. The Computer Advantage Storage
Computers accept and store programs and data.
Users can access a program again and again to process different data.
Computers store huge amounts of data in tiny physical spaces.

35. The Computer Advantage Communications

36. The Computer Advantage Communications
Networks using special equipment and programs allow computers to communicate with each other through telephone lines, cable connections, and satellites.

37. The Computer Advantage Communications
Networks using special equipment and programs allow computers to communicate with each other through telephone lines, cable connections, and satellites.
Users can exchange information over wireless networks using personal digital assistants (PDAs), notebook computers, cell phones, and pagers.

38. The Computer Advantage Communications
A local area network (LAN) is a network confined to a small geographic area, such as a building, factory, or college campus.

39. The Computer Advantage Communications
A wide area network (WAN) spans a large geographical area and might connect a company’s manufacturing plants dispersed throughout the United States.

40. The Computer Advantage Communications
The Internet is a worldwide network of large and small networks linked together via communications hardware, software, and media for the purpose of communicating and sharing information.

41. The Computer Advantage Communications
The Internet is used for various purposes, including

42. The Computer Advantage Communications
The Internet is used for various purposes, including
sending and receiving messages

43. The Computer Advantage Communications
The Internet is used for various purposes, including
sending and receiving messages
researching information

44. The Computer Advantage Communications
The Internet is used for various purposes, including
sending and receiving messages
researching information
buying and selling products and services

45. The Computer Advantage Communications
The Internet is used for various purposes, including
sending and receiving messages
researching information
buying and selling products and services
taking online college courses

46. The Computer Advantage Communications
The Internet is used for various purposes, including
sending and receiving messages
researching information
buying and selling products and services
taking online college courses
accessing entertainment

47. The Computer Advantage Communications

48. The Computer Advantage Communications
World Wide Web – a system of linked computer networks that allows users to move from one site to another by way of links on Web pages

49. The Computer Advantage Communications
World Wide Web – a system of linked computer networks that allows users to move from one site to another by way of links on Web pages
Web page – an electronic document stored on a computer running on a Web site

50. The Computer Advantage Communications
World Wide Web – a system of linked computer networks that allows users to move from one site to another by way of links on Web pages
Web page – an electronic document stored on a computer running on a Web site
Search engine – a software program that locates and retrieves requested information

51. The Computer Advantage
What advantages do computers offer?

52. The Computer Advantage
What advantages do computers offer?
Provide speed, versatility, storage, and communications

53. The Computer Advantage
What advantages do computers offer?
Provide speed, versatility, storage, and communications
Widely used in homes, workplace, and society

54. The Computer Advantage
What advantages do computers offer?
Provide speed, versatility, storage, and communications
Widely used in homes, workplace, and society
Used to communicate, manage finances, analyze data, plan, research, and for hundreds of other purposes

55. How Computers Work
Types of data

56. How Computers Work Types of data
Text data – letters, numbers, and special characters

57. How Computers Work Types of data
Text data – letters, numbers, and special characters
Graphic data – photographs, charts, and drawings

58. How Computers Work Types of data
Text data – letters, numbers, and special characters
Graphic data – photographs, charts, and drawings
Audio data – voice and music

59. How Computers Work Types of data
Text data – letters, numbers, and special characters
Graphic data – photographs, charts, and drawings
Audio data – voice and music
Video data – moving pictures and images

60. How Computers Work
Combining types of data can improve the presentation quality of a message.

61. How Computers Work
During the information processing cycle, data is entered into a computer, processed, sent as output, and stored (if required for future use).

62. Computers and Computer Systems
A personal computer system includes:
System unit
Input devices
Output devices
Storage devices
Communications devices

63. Components of a Computer System
A personal computer system includes:

64. Components of a Computer System
A personal computer system includes:
System unit – the electronic components process data into information

65. Components of a Computer System
A personal computer system includes:
System unit – the electronic components process data into information
Input devices – allow users to enter instructions, data, and commands into a computer; common input devices:
keyboard , mouse, microphone

66. Components of a Computer System
A personal computer system includes:
System unit – electronic components process data into information
Input devices – allow users to enter instructions, data, and commands into a computer; common input devices:
keyboard , mouse, microphone
Output devices – make information available to the user; common output devices:
display screens, printers

67. Components of a Computer System
A personal computer system includes:
Storage devices –provide for permanent storage of programs, data, and information

68. Components of a Computer System
A personal computer system includes:
Storage devices – provide for permanent storage of programs, data, and information
Communications devices – allow a user to exchange instructions, data, and information with other computer users

69. Components of a Computer System
What is the difference between a computer and a computer system?

70. Components of a Computer System
What is the difference between a computer and a computer system?
A computer is the part of the system that processes the data into information.

71. Components of a Computer System
What is the difference between a computer and a computer system?
A computer is the part of the system that processes the data into information.
A computer system includes the computer along with input, output, storage, and communication devices.

72. Categories of Computers Personal Computers
fits on a desk, in a briefcase, on a laptop, or is worn
executes 600 million to 3 billion instructions per second
used by a single user or as part of a network
costs a few hundred to thousands of dollars

73. Categories of Computers Handheld Computer
fits in hand(s) or carried in a pocket
executes a few hundred instructions per second
used by a single user or as part of a network
costs $99 to a few hundred dollars

74. Categories of Computers Workstation
similar in size to desktop PC but larger and more powerful
executes 3 to 5 billion instructions per second
used by a single user or as part of a network
costs a few thousand dollars

75. Categories of Computers Midrange Server
fits into a large cabinet
executes billions of instructions per second
used by hundreds of users at the same time
costs $5,000 to hundreds of thousands of dollars

76. Categories of Computers Large Server or Mainframe
occupies a partial or full room
executes billions of instructions per second
used by hundreds or thousands of users at the same time
costs several thousands to millions of dollars

77. Categories of Computers Supercomputer
occupies a full room
executes trillions of instructions per second
used by thousands of users at the same time
costs several million dollars

78. Categories of Computers
What are the basic categories of computers and their distinguishing characteristics?

79. Categories of Computers
What are the basic categories of computers and their distinguishing characteristics?
Personal computer – self-contained, capable of input, processing, output, and storage

80. Categories of Computers
What are the basic categories of computers and their distinguishing characteristics?
Personal computer – self-contained, capable of input, processing, output, and storage
Handheld computer – fits comfortably in a user’s hand

81. Categories of Computers
What are the basic categories of computers and their distinguishing characteristics?
Personal computer – self-contained, capable of input, processing, output, and storage
Handheld computer – fits comfortably in a user’s hand
Workstation – high-performance single-user computer

82. On the Horizon
Based on the information presented in this chapter and your own experience, what do you think is on the horizon?