Lecture 01 an overview of computers


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Lecture 01 an overview of computers

  1. 1. TMX1010 END-USER COMPUTING Sem 1 Session 2010/2011 Lecture 1: An Overview of Computers
  2. 2. Objectives Overview Define the Explain why computer term, computer, and Describe the five literacy is vital to describe the components of asuccess in today’s world relationship between computer data and informationDiscuss the advantages Define theand disadvantages that term, network, and Discuss the uses of theusers experience when identify benefits of Internet and World working with sharing resources on a Wide Web computers network 2
  3. 3. Objectives Overview Differentiate among types, sizes, andDistinguish between system software Describe the role of each element in an functions of computers in each and application software information system category Explain how home users, small Discuss how society uses computers in office/home office users, mobile education, finance, government, health users, power users, and enterprise care, science, publishing, travel, and users each interact with computers manufacturing 3
  4. 4. A World of Computers• Computers are everywhere 4
  5. 5. What Is a Computer?• A computer is an electronic device, operating under the control of instructions stored in its own memory Collects Produces data Processing information (input) (output) Information Processing Cycle 5
  6. 6. What Is a Computer? 6
  7. 7. The Components of a Computer• A computer contains many electric, electronic, and mechanical components known as hardware Input Device • Allows you to enter data and instructions into a computer Output Device • Hardware component that conveys information to one or more people • Case that contains the electronic components of the computer that System Unit are used to process data Storage Device • Holds data, instructions, and information for future use Communications • Enables a computer to send and receive data, instructions, and Device information to and from one or more computers or mobile devices 7
  8. 8. The Components of a Computer 8
  9. 9. Advantages and Disadvantagesof Using Computers Advantages of Disadvantages of Using Computers Using Computers Speed Health Risks Reliability Violation of Privacy Consistency Public Safety Storage Impact on Labor Force Communications Impact on Environment 9
  10. 10. Advantages and Disadvantagesof Using Computers• Green computing involves reducing the electricity consumed and environmental waste generated when using a computer• Strategies include: – Recycling – Regulating manufacturing processes – Extending the life of computers – Immediately donating or properly disposing of replaced computers 10
  11. 11. Networks and the Internet • A network is a collection of computers and devices connected together, often wirelessly, via communications devices and transmission media 11
  12. 12. Networks and the Internet• The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals 12
  13. 13. Networks and the Internet• People use the Internet for a variety of reasons: Communicate Research and Shop Bank and Invest Online Trading Access Information Entertainment Download Music Share Videos Web Application 13
  14. 14. Networks and the Internet• A social networking Web site encourages members to share their interests, ideas, stories, photos, music, and videos with other registered users 14
  15. 15. Computer Software• Software, also called a program, tells the computer what tasks to perform and how to perform them System Software • Operating system • Utility program Application Software 15
  16. 16. Computer Software• Installing is the process of setting up software to work with the computer, printer, and other hardware 16
  17. 17. Computer Software• A programmer develops software or writes the instructions that direct the computer to process data into information 17
  18. 18. Categories of Computers Personal computers Mobile computers and mobile devices Game consoles Servers Mainframes Supercomputers Embedded computers 18
  19. 19. Personal Computers• A personal computer can perform all of its input, processing, output, and storage activities by itself• Two popular architectures are the PC and the Apple – Desktop computer 19
  20. 20. Mobile Computers and Mobile Devices Mobile MobileComputer Device Personal computer you Computing device small can carry from place to enough to hold in your place hand Examples include Examples include smart notebook phones, PDAs, handheld computers, laptop computers, portable computers, and Tablet media players, and PCs digital cameras 20
  21. 21. Mobile Computers and Mobile Devices Notebook computer Tablet PC Smart phone PDA 21
  22. 22. Mobile Computers and Mobile Devices Handheld computer Portable media player Digital camera 22
  23. 23. Game Consoles• A game console is a mobile computing device designed for single-player or multiplayer video games 23
  24. 24. Servers• A server controls access to the hardware, software, an d other resources on a network – Provides a centralized storage area for programs, data, and information 24
  25. 25. Mainframes• A mainframe is a large, expensive, powerf ul computer that can handle hundreds or thousands of connected users simultaneously 25
  26. 26. Supercomputers• A supercomputer is the fastest, most powerful computer – Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second 26
  27. 27. Embedded Computers• An embedded computer is a special-purpose computer that functions as a component in a larger product Consumer Home Automation Process Controllers Computer Devices Automobiles Electronics Devices and Robotics and Office Machines• Mobile and digital • Thermostats • Antilock brakes • Remote monitoring • Keyboards telephones • Sprinkling systems • Engine control systems • Printers• Digital televisions • Security modules • Power monitors • Faxes• Cameras monitoring systems • Airbag controller • Machine • Copiers• Video recorders • Appliances • Cruise control controllers• DVD players and • Lights • Medical devices recorders• Answering machines 27
  28. 28. Embedded Computers 28
  29. 29. Elements of an Information System Hardware Software Data People Procedures 29
  30. 30. Elements of an Information System 30
  31. 31. Examples of Computer Usage Home User Small Office/Home Mobile User • Personal financial management Office User • Connect to other computers on • Web access • Look up information a network or the Internet • Communications • Send and receive e-mail • Transfer information • Entertainment messages • Play video games • Make telephone calls • Listen to music • Watch movies 31
  32. 32. Examples of Computer Usage Power User Enterprise User • Work with multimedia • Communicate among • Use industry-specific employees software • Process high volumes of transactions • Blog 32
  33. 33. Computer Applications in Society Education Finance Government Health Care 33
  34. 34. Computer Applications in Society Science Publishing Travel Manufacturing 34
  35. 35. Summary Basic computer Components of a concepts computer Many different Networks, the categories of Internet, and computer computers, computer software users, and computer applications in society 35End of Lecture 1