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Chapter 1

Chapter 1. Our Digital World. Presentation Overview. Immersed in Digital Technology The Computer Advantage How Computers Work Computers and Computer Systems Components of a Computer System Categories of Computers. Immersed in Digital Technology. Digital. Immersed in Digital Technology.

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Chapter 1

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  1. Chapter 1 Our Digital World

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

  3. Immersed in Digital Technology Digital

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

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

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

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

  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. • Embedded chips, computers, networks, and the Internet and WWW enable us to communicate globally.

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

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

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

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

  13. 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

  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 • produces results

  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 • stores the results

  16. The Computer AdvantageSpeed

  17. The Computer AdvantageSpeed • Computers operate with lightning-like speed.

  18. The Computer AdvantageSpeed • Computers operate with lightning-like speed. • PCs execute billions of program instructions in one second.

  19. The Computer AdvantageSpeed • 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.

  20. The Computer AdvantageAccuracy

  21. The Computer AdvantageAccuracy • Computers are accurate when accurate programs and data are entered.

  22. The Computer AdvantageAccuracy • 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.

  23. The Computer AdvantageVersatility

  24. The Computer AdvantageVersatility • Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music.

  25. The Computer AdvantageVersatility • Families use computers for entertainment, communications, budgeting, online shopping, homework, playing games, and listening to music. • Universities, government agencies, hospitals, and scientific organizationsconduct life-enhancing research using computers.

  26. The Computer AdvantageVersatility • 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.

  27. The Computer AdvantageVersatility • Retailersprocess sales transactions and check availability of products.

  28. The Computer AdvantageVersatility • Retailers process sales transactions and check availability of products. • Manufacturers manage their entire production, warehousing, and selling processes.

  29. The Computer AdvantageVersatility • 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.

  30. The Computer AdvantageStorage

  31. The Computer AdvantageStorage • Computers accept and store programs and data.

  32. The Computer AdvantageStorage • Computers accept and store programs and data. • Users can access a program again and again to process different data.

  33. The Computer AdvantageStorage • 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.

  34. The Computer AdvantageCommunications

  35. The Computer AdvantageCommunications • Networks using special equipment and programs allow computers to communicate with each other through telephone lines, cable connections, and satellites.

  36. The Computer AdvantageCommunications • 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.

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

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

  39. The Computer AdvantageCommunications 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.

  40. The Computer AdvantageCommunications The Internet is used for various purposes, including

  41. The Computer AdvantageCommunications The Internet is used for various purposes, including • sending and receiving messages

  42. The Computer AdvantageCommunications The Internet is used for various purposes, including • sending and receiving messages • researching information

  43. The Computer AdvantageCommunications The Internet is used for various purposes, including • sending and receiving messages • researching information • buying and selling products and services

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

  45. The Computer AdvantageCommunications 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

  46. The Computer AdvantageCommunications

  47. The Computer AdvantageCommunications • 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

  48. The Computer AdvantageCommunications • 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

  49. The Computer AdvantageCommunications • 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

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