Concepts 7 Unit B Ppt

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Concepts 7 Unit B Ppt

  1. 1. Computer Concepts - Illustrated Introductory, Seventh Edition UNIT B: Computer Hardware
  2. 2. Objectives <ul><li>Examine input devices </li></ul><ul><li>Review display devices </li></ul><ul><li>Compare printers </li></ul><ul><li>Introduce storage technology </li></ul><ul><li>Compare storage technologies </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  3. 3. Objectives <ul><li>Explore hard drive technology </li></ul><ul><li>Examine CDs and DVDs </li></ul><ul><li>Review solid-state storage </li></ul><ul><li>Expand your computer </li></ul><ul><li>Talking Points: Why recycle computers? </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  4. 4. Examining Input Devices <ul><li>Input devices - input information for computer to process </li></ul><ul><li>Typical input devices </li></ul><ul><ul><li>Keyboard and pointing device (mouse) </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  5. 5. Examining Input Devices <ul><li>Keyboards </li></ul><ul><ul><li>Most have a similar structure </li></ul></ul><ul><ul><li>Can be found on PCs, handheld devices </li></ul></ul><ul><li>Keyboard includes keys or buttons with letters, numbers, and special words and characters </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  6. 6. Examining Input Devices <ul><li>Desktop and notebook computer keyboards include Navigation keypad </li></ul><ul><ul><li>Home, End, arrow keys </li></ul></ul><ul><ul><li>Used to move screen-based insertion point (cursor) </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  7. 7. Examining Input Devices <ul><li>Mouse </li></ul><ul><ul><li>Pointing device which manipulates an on-screen pointer and other on-screen controls </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  8. 8. Examining Input Devices <ul><li>Mouse options - </li></ul><ul><ul><li>Mechanical mouse </li></ul></ul><ul><ul><ul><li>Position based on movement of ball that rolls on pad </li></ul></ul></ul><ul><ul><li>Optical mouse </li></ul></ul><ul><ul><ul><li>Uses LED light and computer chip </li></ul></ul></ul><ul><ul><li>Laser mouse </li></ul></ul><ul><ul><ul><li>Uses laser as light source to track movement </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  9. 9. Examining Input Devices <ul><li>Mouse dots per inch (dpi) </li></ul><ul><ul><li>Higher dpi more sensitive and accurate </li></ul></ul><ul><li>Mouse transmits signals one of two ways </li></ul><ul><ul><li>Wired or Wireless </li></ul></ul><ul><li>Most prefer optical or laser </li></ul><ul><ul><li>Durability </li></ul></ul><ul><ul><li>Less maintenance </li></ul></ul><ul><ul><li>Can be used on variety of surfaces </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  10. 10. Examining Input Devices <ul><li>Other pointing devices </li></ul><ul><ul><li>Pointing stick or TrackPoint </li></ul></ul><ul><ul><li>Touchpad or trackpad </li></ul></ul><ul><ul><li>Trackball </li></ul></ul><ul><ul><li>Joystick </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  11. 11. Examining Input Devices <ul><li>Other input devices </li></ul><ul><ul><li>Touch screen technology </li></ul></ul><ul><ul><li>Scanner </li></ul></ul><ul><ul><li>Microphone </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  12. 12. Reviewing Display Devices <ul><li>Computer display system </li></ul><ul><ul><li>Main output device </li></ul></ul><ul><li>Two key components </li></ul><ul><ul><li>Graphics card </li></ul></ul><ul><ul><li>Display device such as monitor or screen </li></ul></ul><ul><li>Use one of three technologies </li></ul><ul><ul><li>CRT, LCD, plasma </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  13. 13. Reviewing Display Devices <ul><li>CRT Monitor(cathode ray tube) </li></ul><ul><ul><li>used to be standard </li></ul></ul><ul><ul><li>Big and bulky </li></ul></ul><ul><ul><li>Not typically sold with new computers today </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  14. 14. Reviewing Display Devices <ul><li>LCD (liquid crystal display) </li></ul><ul><ul><li>Produces image by manipulating light within layer of crystal cells </li></ul></ul><ul><li>Advantages include </li></ul><ul><ul><li>Display clarity </li></ul></ul><ul><ul><li>Low radiation emission </li></ul></ul><ul><ul><li>Portability and compactness </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  15. 15. Reviewing Display Devices <ul><li>Plasma </li></ul><ul><ul><li>Creates on-screen image by illuminating miniature colored fluorescent lights arrayed in panel-like screen </li></ul></ul><ul><ul><li>More expensive than LCD </li></ul></ul><ul><ul><li>Used more for large screen venues </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  16. 16. Reviewing Display Devices <ul><li>Graphics cards </li></ul><ul><ul><li>Contain graphics processing units (GPU) </li></ul></ul><ul><ul><ul><li>Circuitry generates signals for displaying image on screen </li></ul></ul></ul><ul><ul><li>Amount of available video memory </li></ul></ul><ul><ul><ul><li>Key to how fast screen updates when information is displayed </li></ul></ul></ul><ul><ul><li>Typically built into motherboard </li></ul></ul><ul><ul><li>Sometimes available as small circuit board that plugs into motherboard </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  17. 17. Reviewing Display Devices <ul><li>Graphics card - key to how images display on monitor </li></ul><ul><ul><li>Resolution </li></ul></ul><ul><ul><ul><li>Maximum number of horizontal and vertical pixels displayed on screen </li></ul></ul></ul><ul><ul><li>Pixel (picture element) </li></ul></ul><ul><ul><ul><li>single point or smallest unit in image </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  18. 18. Reviewing Display Devices Comparing Screen Resolution Computer Concepts – Illustrated Introductory, Seventh Edition
  19. 19. Reviewing Display Devices <ul><li>Screen size </li></ul><ul><ul><li>Measurement in inches from one corner of screen diagonally to opposite corner </li></ul></ul><ul><ul><li>Typical monitor sizes </li></ul></ul><ul><ul><ul><li>13” to 21” </li></ul></ul></ul><ul><ul><ul><li>Larger screens exist </li></ul></ul></ul><ul><li>Viewing angle width </li></ul><ul><ul><li>How far to side you can clearly see screen image </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  20. 20. Reviewing Display Devices <ul><li>Dot pitch (dp) </li></ul><ul><ul><li>Measure of image clarity </li></ul></ul><ul><ul><li>Smaller dp means crisper image </li></ul></ul><ul><li>Dot pitch - distance in millimeters between like-colored pixels </li></ul><ul><ul><li>Ranges from .26 mm to .23 mm </li></ul></ul><ul><ul><li>Not customizable </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  21. 21. Reviewing Display Devices <ul><li>Color depth or bit depth </li></ul><ul><ul><li>Number of colors monitor and graphics card can display </li></ul></ul><ul><ul><li>Most PCs can display millions of colors </li></ul></ul><ul><li>Monitors can be used to watch television </li></ul><ul><ul><li>if proper circuitry is installed </li></ul></ul><ul><ul><li>NTSC or HDTV circuitry </li></ul></ul><ul><ul><ul><li>Allows PC to accept signals from antenna or cable </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  22. 22. Comparing Printers <ul><li>Printers </li></ul><ul><ul><li>Produce hard copy of computer-generated text or graphical images </li></ul></ul><ul><ul><ul><li>Paper, labels, transparencies </li></ul></ul></ul><ul><ul><li>Differ in resolution and speed </li></ul></ul><ul><ul><li>Most printers use ink-jet or laser technologies </li></ul></ul><ul><li>Specialized applications </li></ul><ul><ul><li>Impact, solid ink, thermal transfer, dye sublimation </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  23. 23. Comparing Printers <ul><li>Ink-jet printers </li></ul><ul><ul><li>Sprays ink onto paper to form characters and graphics </li></ul></ul><ul><ul><li>Two ink cartridges: Black and color </li></ul></ul><ul><ul><li>Small, lightweight, inexpensive </li></ul></ul><ul><ul><li>Cartridges can be expensive and add to printing costs </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  24. 24. Comparing Printers <ul><li>Laser printer </li></ul><ul><ul><li>Produces dots of light on light sensitive drum to produce characters and graphics </li></ul></ul><ul><ul><li>Good high-volume, good quality printing </li></ul></ul><ul><ul><li>More expensive than ink-jet </li></ul></ul><ul><ul><li>Color laser printers more expensive than black-and-white </li></ul></ul><ul><ul><li>Toner cartridges are expensive, produce more pages than ink-jet cartridges </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  25. 25. Comparing Printers <ul><li>Photo printers </li></ul><ul><ul><li>Use thermal dye </li></ul></ul><ul><ul><li>Slower output speeds than other printers </li></ul></ul><ul><ul><li>Produce professional-quality images on specialized papers </li></ul></ul><ul><ul><li>Cost of replacement cartridges should be considered </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  26. 26. Comparing Printers <ul><li>Printer resolution </li></ul><ul><ul><li>Density of grid of dots that create image </li></ul></ul><ul><ul><li>Measured in dpi (dots per inch) </li></ul></ul><ul><ul><ul><li>At reading distance, 900 dpi looks solid </li></ul></ul></ul><ul><ul><ul><li>Good-quality printers are rated 2400 to 4800 dpi </li></ul></ul></ul><ul><ul><ul><li>Magazine quality printouts are about 900 dpi </li></ul></ul></ul><ul><ul><ul><li>Expensive coffee-table books are comparable to 2400 dpi or higher </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  27. 27. Comparing Printers <ul><li>Pages per minute (ppm) </li></ul><ul><ul><ul><li>Measurement of printer speed </li></ul></ul></ul><ul><ul><ul><li>Color usually takes longer to print than black-and-white </li></ul></ul></ul><ul><ul><ul><li>Text prints faster than heavy graphics </li></ul></ul></ul><ul><ul><ul><li>Most printers for personal or small business print 15 to 30 ppm </li></ul></ul></ul><ul><li>Memory capacity </li></ul><ul><ul><ul><li>More memory needed to print color and graphics </li></ul></ul></ul><ul><ul><ul><li>Laser printers: Between 64 MB and 120 MB </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  28. 28. Comparing Printers <ul><li>Duplex printer </li></ul><ul><ul><li>Can print both sides of paper </li></ul></ul><ul><li>Duty cycle </li></ul><ul><ul><li>Proportion of time during which device is operated </li></ul></ul><ul><ul><li>Usually measured in pages per month </li></ul></ul><ul><ul><li>Higher duty cycle means shorter useful life </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  29. 29. Comparing Printers <ul><li>Computer connected to network can share printer with other computers on network </li></ul><ul><li>Network-enabled printer </li></ul><ul><ul><li>Connects directly to network, not single computer </li></ul></ul><ul><ul><li>Network connection can be wired or wireless </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  30. 30. Introducing Storage Technology <ul><li>Storage technology </li></ul><ul><ul><li>Data storage systems that allow electronic devices to store and retrieve data </li></ul></ul><ul><ul><li>Data storage consists of storage medium and storage device </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  31. 31. Introducing Storage Technology <ul><li>Storage medium </li></ul><ul><ul><li>Hard drive, tape, memory card, CD, DVD or other technology that holds data </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  32. 32. Introducing Storage Technology <ul><li>Storage device </li></ul><ul><ul><li>Equipment that stores and retrieves data from storage medium </li></ul></ul><ul><ul><li>Hard drives, card readers, tape drives, CD and DVD drives, flash drives, solid-state drives, Zip drives </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  33. 33. Introducing Storage Technology <ul><li>Hard drive </li></ul><ul><ul><li>Computers come with internal hard drive </li></ul></ul><ul><ul><li>Can’t be moved from one computer to another </li></ul></ul><ul><ul><li>Provide fast data access </li></ul></ul><ul><li>Some storage devices are more dependable than others </li></ul><ul><ul><li>CDs, DVDs </li></ul></ul><ul><li>Flash drives and external hard drives </li></ul><ul><ul><li>Can be moved from computer to computer </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  34. 34. Introducing Storage Technology <ul><li>RAM (random access memory) </li></ul><ul><ul><li>Temporary holding area for your work and programs needed to produce your work </li></ul></ul><ul><ul><li>RAM - emptied when computer shuts off </li></ul></ul><ul><ul><li>Data easily lost </li></ul></ul><ul><ul><ul><li>Store data on storage medium, not as likely to lose work </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  35. 35. Introducing Storage Technology <ul><li>Drive bays </li></ul><ul><ul><li>Storage “parking spaces” </li></ul></ul><ul><ul><ul><li>In system unit case </li></ul></ul></ul><ul><ul><ul><li>Used to connect storage devices to computer </li></ul></ul></ul><ul><ul><li>Internal or external </li></ul></ul><ul><li>When buying computer, find out: </li></ul><ul><ul><li>How many drive bays it has </li></ul></ul><ul><ul><li>What storage devices can be connected </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  36. 36. Introducing Storage Technology <ul><li>Drive bays </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  37. 37. Comparing Storage Technologies <ul><li>Random vs. sequential access </li></ul><ul><ul><li>Random (direct) access </li></ul></ul><ul><ul><ul><li>Ability to jump directly to requested data </li></ul></ul></ul><ul><ul><ul><li>Hard drive, solid-state drive, CD and DVD drives </li></ul></ul></ul><ul><ul><li>Sequential access </li></ul></ul><ul><ul><ul><li>Must read through data from beginning to end </li></ul></ul></ul><ul><ul><ul><li>Tape drive </li></ul></ul></ul><ul><ul><ul><li>Slower </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  38. 38. Comparing Storage Technologies <ul><li>Access time </li></ul><ul><ul><li>Average time it takes computer to locate and read data </li></ul></ul><ul><ul><li>Measured in milliseconds </li></ul></ul><ul><li>Data transfer rate </li></ul><ul><ul><li>Amount of data that can be moved from storage medium to computer per second </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  39. 39. Comparing Storage Technologies <ul><li>Storage capacity </li></ul><ul><ul><li>Maximum amount of data that can be stored on storage medium </li></ul></ul><ul><ul><ul><li>Measured in kilobytes (KB), megabytes (MB), gigabytes (GB), or terabytes (TB) </li></ul></ul></ul><ul><ul><li>Graphics need more storage capacity than text </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  40. 40. Comparing Storage Technologies <ul><li>Magnetic storage </li></ul><ul><ul><li>Magnetizes microscopic particles on disk or tape surface </li></ul></ul><ul><ul><li>Particle patterns are interpreted as 0s and 1s </li></ul></ul><ul><ul><li>Provides flexibility for editing data and reusing storage medium </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  41. 41. Comparing Storage Technologies <ul><li>Magnetic media </li></ul><ul><ul><li>No very durable </li></ul></ul><ul><ul><li>Eventually loses magnetic field </li></ul></ul><ul><ul><li>Damaged by magnetic fields, dust, mold, smoke, heat, mechanical problems </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  42. 42. Comparing Storage Technologies <ul><li>Optical storage </li></ul><ul><ul><li>Stores data as light and dark spots on surface of disk </li></ul></ul><ul><ul><li>Light patterns are interpreted as 1s and 0s </li></ul></ul><ul><ul><li>Advantages: </li></ul></ul><ul><ul><ul><li>Portable </li></ul></ul></ul><ul><ul><ul><li>Quite versatile </li></ul></ul></ul><ul><ul><ul><li>Less susceptible to environmental damage </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  43. 43. Comparing Storage Technologies <ul><li>Solid-state storage </li></ul><ul><ul><li>Stores data in nonvolatile, erasable, low-power chip </li></ul></ul><ul><ul><li>Drive has no moving parts </li></ul></ul><ul><ul><li>Very durable, portable, versatile </li></ul></ul><ul><ul><li>Capacity does not currently match that of hard drives </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  44. 44. Comparing Storage Technologies <ul><li>Why Versatility? </li></ul><ul><ul><li>Important working with other people and other computers </li></ul></ul><ul><ul><li>Store data and share with others using same storage medium </li></ul></ul><ul><li>Why Durability? </li></ul><ul><ul><li>Determines ability of device or media to last so data remains accessible </li></ul></ul><ul><ul><li>Important for traveling and carrying files </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  45. 45. Exploring Hard Drive Technology <ul><li>Hard drives preferred type of main storage </li></ul><ul><ul><li>Three main reasons </li></ul></ul><ul><ul><ul><li>Storage capacity </li></ul></ul></ul><ul><ul><ul><li>Fast access </li></ul></ul></ul><ul><ul><ul><li>Economical </li></ul></ul></ul><ul><ul><ul><ul><li>40 MG of storage costs about a penny </li></ul></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  46. 46. Exploring Hard Drive Technology <ul><li>Parts of hard drive </li></ul><ul><ul><li>One or more platters on spindle with associated read-write heads </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  47. 47. Exploring Hard Drive Technology <ul><li>Hard drives found in wide variety of digital devices </li></ul><ul><li>Physical size of hard drive varies depending on size of device </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  48. 48. Exploring Hard Drive Technology <ul><li>Factors that determine how fast data can be made available </li></ul><ul><ul><li>Access time (measures in milliseconds) </li></ul></ul><ul><ul><li>Rotation speed (measured in revolutions per minute) </li></ul></ul><ul><li>Hard drive platters with data are divided into tracks and sectors </li></ul><ul><ul><li>Cylinder </li></ul></ul><ul><ul><ul><li>Vertical stack of tracks </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  49. 49. Exploring Hard Drive Technology <ul><li>Controller </li></ul><ul><ul><li>Circuit board that positions disk, locates data, and interfaces with components on system board </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition Hard drive showing Controller card
  50. 50. Exploring Hard Drive Technology <ul><li>Adding second hard drive increases storage, provides backup </li></ul><ul><ul><li>Data available on only one drive at a time </li></ul></ul><ul><li>Hard drives </li></ul><ul><ul><li>Not as durable as many other storage technologies </li></ul></ul><ul><ul><li>Head crash can be caused by particles as small as piece of dust </li></ul></ul><ul><ul><li>Handle and transport with care </li></ul></ul><ul><ul><li>Always have backup copies of hard drive </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  51. 51. Examining CDs and DVDs <ul><li>CDs and DVDs can be used to store data </li></ul><ul><ul><li>CD (compact disc) </li></ul></ul><ul><ul><li>DVD (digital video disc or digital versatile disc) </li></ul></ul><ul><li>Three optical digital technologies </li></ul><ul><ul><li>Read-only (ROM) </li></ul></ul><ul><ul><li>Recordable </li></ul></ul><ul><ul><li>Rewritable </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  52. 52. Examining CDs and DVDs <ul><li>CD-ROM </li></ul><ul><ul><li>Read-only technology </li></ul></ul><ul><li>CD-R </li></ul><ul><ul><li>Recordable technology </li></ul></ul><ul><li>CD-RW </li></ul><ul><ul><li>Rewritable technology </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  53. 53. Examining CDs and DVDs <ul><li>DVD-R and DVD+R </li></ul><ul><ul><li>Recordable DVD formats </li></ul></ul><ul><li>DVD-RW and DVD+RW </li></ul><ul><ul><li>Rewritable formats </li></ul></ul><ul><li>Why so many? </li></ul><ul><ul><li>One standard has not emerged as industry leader </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  54. 54. Examining CDs and DVDs <ul><li>Computer CD-ROM or DVD-ROM </li></ul><ul><ul><li>Discs cannot have data added, erased, or changed </li></ul></ul><ul><li>To record data one or more times </li></ul><ul><ul><li>Need recordable media (one time use) </li></ul></ul><ul><ul><li>Rewritable (multiple session use) discs </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  55. 55. Examining CDs and DVDs <ul><li>Good idea to have CD or DVD drive </li></ul><ul><ul><li>Create music CDs or DVDs </li></ul></ul><ul><ul><li>CD drives can’t read DVDs </li></ul></ul><ul><ul><li>Most DVDs can read DVDs or CDs </li></ul></ul><ul><li>Several types of CD and DVD drives </li></ul><ul><ul><li>Can be used for different purposes </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  56. 56. Examining CDs and DVDs Computer Concepts – Illustrated Introductory, Seventh Edition CD or DVD Drive Capabilities
  57. 57. Examining CDs and DVDs <ul><li>Rewritable CD and DVD drives </li></ul><ul><ul><li>Not acceptable replacement for hard drive </li></ul></ul><ul><ul><li>Saving, accessing, modifying data is much slower </li></ul></ul><ul><ul><li>Capacity is inadequate when compared to hard drives </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  58. 58. Examining CDs and DVDs <ul><li>CD and DVD drives use laser technology to read data </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  59. 59. Examining CDs and DVDs <ul><li>Make your own CDs </li></ul><ul><ul><li>Need proper hardware, media </li></ul></ul><ul><li>CD-R or DVD-R </li></ul><ul><ul><li>Must put all data on disc in one session </li></ul></ul><ul><li>Rewritable technology </li></ul><ul><ul><li>Can record in multiple sessions </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  60. 60. Examining CDs and DVDs <ul><li>Handling CDs and DVDs </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  61. 61. Reviewing Solid-State Storage <ul><li>Solid-state storage </li></ul><ul><ul><li>Portable and durable </li></ul></ul><ul><ul><li>Provides fast data access </li></ul></ul><ul><ul><li>Uses very little power </li></ul></ul><ul><ul><li>Used in consumer devices </li></ul></ul><ul><ul><ul><li>Digital cameras, MP3 players, notebooks, PDAs, cell phones </li></ul></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  62. 62. Reviewing Solid-State Storage <ul><li>Solid-state storage suitable for many needs </li></ul><ul><ul><li>Can hold hundreds of photos </li></ul></ul><ul><ul><li>Store MP3 files </li></ul></ul><ul><ul><li>Portable computing </li></ul></ul><ul><li>Data can be erased so card can be reused </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  63. 63. Reviewing Solid-State Storage <ul><li>How does it work? </li></ul><ul><ul><li>Nonvolatile, erasable, low-power chip stores data </li></ul></ul><ul><ul><li>Circuitry arranged in grid </li></ul></ul><ul><ul><ul><li>Each cell holding transistors that act as gates </li></ul></ul></ul><ul><ul><ul><li>Open gates represent 1, closed represents 0 </li></ul></ul></ul><ul><li>Chip retains data without external power </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  64. 64. Reviewing Solid-State Storage <ul><li>Several types of solid-state memory cards </li></ul><ul><ul><li>CompactFlash cards (CF) </li></ul></ul><ul><ul><li>MultiMedia cards (MMC) </li></ul></ul><ul><ul><li>SecureDigital cards (SD) </li></ul></ul><ul><ul><li>SmartMedia cards </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  65. 65. Reviewing Solid-State Storage <ul><li>Card reader </li></ul><ul><ul><li>Transfers data to and from computer </li></ul></ul><ul><ul><li>Can stand alone, or be part of system unit </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  66. 66. Reviewing Solid-State Storage <ul><li>USB flash drive </li></ul><ul><ul><li>Portable storage device with built-in connector that plugs into USB port </li></ul></ul><ul><ul><li>Small and durable </li></ul></ul><ul><ul><li>Can be carried on key ring </li></ul></ul><ul><li>U3 drive or U3 smart drive </li></ul><ul><ul><li>Special USB flash drive preconfigured to play automatically when connected to computer </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  67. 67. Expanding Your Computer <ul><li>Expanding </li></ul><ul><ul><li>Increase / improve capabilities of computer </li></ul></ul><ul><ul><li>Add peripherals </li></ul></ul><ul><ul><ul><li>Scanners, mouse, cameras, graphics tablets, etc. </li></ul></ul></ul><ul><ul><li>Add or upgrade sound cards, video cards, etc. </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  68. 68. Expanding Your Computer <ul><li>Most peripherals can be added using external USB port </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  69. 69. Expanding Your Computer <ul><li>Expansion cards can be added / upgraded to enhance functionality </li></ul><ul><ul><li>Graphics card </li></ul></ul><ul><ul><li>Modem card </li></ul></ul><ul><ul><li>Sound card </li></ul></ul><ul><ul><li>Network card </li></ul></ul><ul><li>Also called expansion boards, controller cards, or adapters </li></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  70. 70. Expanding Your Computer <ul><li>An expansion card </li></ul><ul><ul><li>Small circuit board that provides computer ability to control input, storage, or output devices </li></ul></ul><ul><li>Data bus </li></ul><ul><ul><li>Circuits over which data travels from one component to another </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  71. 71. Expanding Your Computer <ul><li>Expansion bus </li></ul><ul><ul><li>Segment of data bus between RAM and peripheral devices </li></ul></ul><ul><ul><li>Allows data to travel through expansion slots, cards, ports, and cables </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  72. 72. Expanding Your Computer <ul><li>Expansion slot </li></ul><ul><ul><li>Long, narrow socket on motherboard into which expansion card is plugged </li></ul></ul><ul><li>PCMCIA slot </li></ul><ul><ul><li>External expansion slot for PC </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  73. 73. Expanding Your Computer <ul><li>Expansion ports </li></ul><ul><ul><li>Connectors that pass data in and out of computer or peripheral device </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  74. 74. Expanding Your Computer <ul><li>Device driver </li></ul><ul><ul><li>Software that sets up communication between computer and device or card </li></ul></ul><ul><ul><li>Each device or card needs one </li></ul></ul><ul><ul><li>Directions supplied with device or card includes instructions for installing device driver </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  75. 75. Talking Points: Why recycle computers? <ul><li>500 million computers were obsolete by 2007 </li></ul><ul><li>About 1 billion floppy discs, CDs, and DVDs end up in landfills every year </li></ul><ul><li>Computer parts contain toxins like lead, phosphorous, and mercury </li></ul><ul><ul><li>Monitors can contain up to six pounds of lead </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition
  76. 76. Talking Points: Why recycle computers? <ul><li>Instead of throwing away </li></ul><ul><ul><li>Sell it </li></ul></ul><ul><ul><li>Donate it to school, church, or community program </li></ul></ul><ul><ul><li>Have it hauled away by professional recycling firm </li></ul></ul><ul><ul><li>Send it back to manufacturer </li></ul></ul>Computer Concepts – Illustrated Introductory, Seventh Edition

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