Computers2 Ch1


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Chapter 1 Lectures - Part II

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Computers2 Ch1

  1. 1. Computers Tools for an information Age Chapter 1 B.M.H PC assemble procedure
  2. 2. Review <ul><li>A computer is a device that </li></ul><ul><ul><li>1) accepts ( ) </li></ul></ul><ul><ul><li>2) ( ) data, </li></ul></ul><ul><ul><li>3) ( ) data, </li></ul></ul><ul><ul><li>4) and produces ( ) </li></ul></ul>MIU
  3. 3. Learning Objectives <ul><li>Computer System ’ s Basic Components </li></ul><ul><li>Hardware </li></ul><ul><li>Network </li></ul><ul><li>Internet </li></ul>MIU
  4. 4. What is a computer? <ul><li>In von Neumann ’ s paper </li></ul><ul><li>Computer : a device that </li></ul><ul><ul><li>1) accepts input, </li></ul></ul><ul><ul><li>2) processes data, </li></ul></ul><ul><ul><li>3) stores data, </li></ul></ul><ul><ul><li>4) and produces output. </li></ul></ul>MIU output device Input device memory device Control, Operating device
  5. 5. Computer System <ul><li>The procedure from input to output </li></ul><ul><ul><li>Is directed by the software </li></ul></ul><ul><ul><li>performed by the hardware </li></ul></ul>MIU Processing Data Information Storage Input Output
  6. 6. Computer System <ul><li>Hardware </li></ul><ul><ul><li>The equipment associated with a computer system </li></ul></ul><ul><li>Software </li></ul><ul><ul><li>A set of instructions </li></ul></ul><ul><ul><ul><li>Which tells the hardware what to do </li></ul></ul></ul><ul><ul><li>Referred to as programs </li></ul></ul><ul><li>People </li></ul><ul><ul><li>Use the power of the computer </li></ul></ul>MIU
  7. 7. What is the Hardware? <ul><li>The physical components of the computer </li></ul><ul><li>The pieces we can pick up and touch </li></ul>MIU
  8. 8. Hardware <ul><li>The hardware of four aspects of computer system </li></ul>MIU Processor (CPU) input output storage Input device Output device Secondary storage Processing Memory
  9. 9. Hardware <ul><li>To function, computer system </li></ul><ul><ul><li>; Four main aspects of data handling : </li></ul></ul><ul><ul><li>Input </li></ul></ul><ul><ul><li>Processing </li></ul></ul><ul><ul><li>Output </li></ul></ul><ul><ul><li>Storage </li></ul></ul><ul><li>The hardware is responsible for these four areas </li></ul><ul><ul><li>Input device </li></ul></ul><ul><ul><li>Process or (CPU: Central Processing Unit) </li></ul></ul><ul><ul><li>Output device </li></ul></ul><ul><ul><li>Storage (secondary storage) </li></ul></ul>MIU
  10. 10. Your PC Hardware <ul><li>Input Devices </li></ul><ul><li>Process & Memory </li></ul><ul><li>Output Devices </li></ul><ul><li>Secondary Storage </li></ul>
  11. 11. Input devices <ul><li>accept data or commands in a form that the computer can use </li></ul><ul><li>send the data or commands to the processing unit </li></ul><ul><li>Some common ways of input to the system </li></ul><ul><ul><li>Typing : keyboard </li></ul></ul><ul><ul><li>Pointing : mouse </li></ul></ul><ul><ul><li>Scanning : wand reader, bar code reader, scanner </li></ul></ul>MIU
  12. 12. MIU
  13. 13. MIU
  14. 14. MIU Flatbed scanner Sheetfed scanner handheld scanner
  15. 15. Processor <ul><li>: Central Processing Unit (CPU) </li></ul><ul><li>Consists of electronic circuits </li></ul><ul><ul><li>that interpret and execute program instructions. </li></ul></ul><ul><li>Communicates with the input, output and storage devices. </li></ul><ul><li>Actually transforms data into information </li></ul>MIU
  16. 16. Processor MIU AGP bus bus PIN PIN Microprocessor
  17. 17. MIU <ul><li>Industry Standard Architecture (ISA) bus </li></ul><ul><ul><li>Is used for slow-speed devices such as the mouse and modem </li></ul></ul><ul><li>Peripheral Component Interconnect (PCI) bus </li></ul><ul><ul><li>A high-speed bus used to connect devices such as hard disks and network cards </li></ul></ul><ul><li>Accelerated Graphics Port (AGP) </li></ul><ul><ul><li>Designed to provide a dedicated connection between memory and an AGP graphics card </li></ul></ul>Processor
  18. 18. MIU Intel Pentium IV Processor AMD Processor
  19. 19. Memory <ul><li>Known as primary storage . </li></ul><ul><li>Holds the data only temporarily. </li></ul><ul><li>Holds the programs (computer instructions) needed by the CPU. </li></ul><ul><ul><li>RAM (Random Access Memory) </li></ul></ul><ul><ul><li>ROM (Read Only Memory) </li></ul></ul>MIU
  20. 20. MIU
  21. 21. MIU                            
  22. 22. Output devices <ul><li>Show people the processed data(information) in understandable and usable form </li></ul><ul><li>The most common ones : monitor, printer </li></ul>MIU
  23. 23. MIU
  24. 24. MIU Inkjet Printer Laser Printer Dot-matrix Printer
  25. 25. Storage <ul><li>Usually secondary storage . </li></ul><ul><li>Can store data and programs outside of the computer itself. </li></ul>MIU
  26. 26. Secondary Storage <ul><li>Magnetic disk </li></ul><ul><ul><li>Diskette, hard disks </li></ul></ul><ul><ul><li>Disk drives : </li></ul></ul><ul><ul><li>devices to read disk data </li></ul></ul><ul><li>Optical disk </li></ul><ul><ul><li>CD-ROMs and DVD-ROMs </li></ul></ul><ul><ul><li>Uses a laser beam to read large volumes of data relatively inexpensively </li></ul></ul><ul><li>Magnetic tape (for backup purpose) </li></ul><ul><ul><li>reel tape, cartridge tape </li></ul></ul><ul><ul><li>Tape drives </li></ul></ul>MIU
  27. 27. MIU
  28. 28. MIU 3.5 ” Disket 5.25 ” Disket
  29. 29. MIU
  30. 30. MIU
  31. 31. MIU
  32. 32. Complete HW System <ul><li>Peripheral Equipment </li></ul><ul><ul><li>The hardware devices </li></ul></ul><ul><ul><ul><li>that are attached to the computer </li></ul></ul></ul><ul><ul><li>Includes all input, output and secondary storage device </li></ul></ul>MIU
  33. 33. Peripheral Equipment <ul><li>In most computer </li></ul><ul><ul><li>The CPU and disk drives : in the same housing, a metal case </li></ul></ul><ul><ul><li>The keyboard, mouse, and monitor : separate </li></ul></ul><ul><li>In larger computer system </li></ul><ul><ul><li>The input, processing, output, and storage functions </li></ul></ul><ul><ul><ul><li>May be separate rooms, separate buildings, or even separate countries </li></ul></ul></ul>MIU
  34. 34. Network Internet
  35. 35. Network <ul><li>A system that uses communications equipment </li></ul><ul><ul><li>to connect computers and their resources </li></ul></ul><ul><ul><li>Resources : printers, hard disks, software and data </li></ul></ul><ul><li>A collection of computers and other devices </li></ul><ul><ul><li>that communicate to share data, HW, and SW. </li></ul></ul><ul><li>Types </li></ul><ul><ul><li>Local Area Network (LAN) : in a building or campus </li></ul></ul><ul><ul><li>Wide Area Network (WAN) : across the country </li></ul></ul>MIU
  36. 36. Internet <ul><li>Called simply “ the Net ” </li></ul><ul><li>Inter (among) + Network </li></ul><ul><ul><li>Small networks : a few computer within a building </li></ul></ul><ul><ul><li>Larger networks : connections across the country </li></ul></ul><ul><ul><li>Internet : the world ’ s largest computer network </li></ul></ul><ul><ul><ul><li>connections for millions of computers all over the globe. </li></ul></ul></ul><ul><li>Connects users to the worldwide </li></ul><ul><li>Provides many information services </li></ul>MIU
  37. 37. What to do through the Internet? <ul><li>Gathering Information </li></ul><ul><li>Searching for the information </li></ul><ul><li>Downloading a Free Trial Program </li></ul><ul><li>Reading the News on the Internet </li></ul><ul><li>Internet Shopping </li></ul><ul><li>Playing the Music, Videos </li></ul><ul><li>Chatting with other people in real time </li></ul><ul><li>Sending and receiving electronic mail </li></ul>MIU