Computer Hardware

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Introductory slideshow to computer concepts and hardware technology.

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  • Computer Hardware

    1. 1. Computer Applications Computer Essentials Hardware
    2. 2. Computer Hardware Memory Output Input Processor Hard disk Flash memory CD or DVD Storage Temporary Data Holding Data Data Data Data Data
    3. 3. Software Program Types <ul><li>System Software: all the programs that help the computer function </li></ul><ul><ul><li>operating system (OS) - including user interface </li></ul></ul><ul><li>Application Software: all the programs you can use to perform a task </li></ul><ul><ul><li>productivity software </li></ul></ul><ul><ul><li>special-purpose programs </li></ul></ul>
    4. 4. The Physical Components <ul><li>Input devices </li></ul><ul><li>Processing </li></ul><ul><li>Output devices </li></ul><ul><li>Storage devices </li></ul><ul><li>Communications devices </li></ul>
    5. 5. Input Devices <ul><li>Keyboard </li></ul><ul><li>Mouse, Touch pad, Joystick </li></ul><ul><li>Touch screen </li></ul><ul><li>Digital Camera, Digital Video </li></ul><ul><li>Microphone, Sound card </li></ul><ul><li>Scanner </li></ul><ul><li>Barcode Reader </li></ul>
    6. 6. Output Devices <ul><li>Monitor, Video Adapter Card </li></ul><ul><li>Printer, Laser or Inkjet </li></ul><ul><li>Loudspeakers, Audio Output </li></ul><ul><li>Tactile Feedback, Braille </li></ul>
    7. 7. Bits and Bytes <ul><li>bit = b inary dig it the basic unit of information 1 or 0 </li></ul><ul><li>byte = 8 bits enough combinations (2 8 = 256) to store essential characters </li></ul>
    8. 8. Extended ASCII character codes
    9. 9. But modern computers use Unicode, which is a much greater encoding system. It allows for encoding of all the languages in the world.
    10. 10. Big & Way Big Bytes <ul><li>Byte a grouping of eight bits for instance - -> 0110 0001 </li></ul><ul><li>Kb ( kilo byte) about 1000 bytes </li></ul><ul><li>Mb ( mega byte) about one thousand Kb or one million bytes </li></ul><ul><li>Gb ( giga byte) about one thousand Mb or one billion bytes </li></ul><ul><li>Tb ( tera byte) is about one thousand Gb or one trillion bytes </li></ul>
    11. 11. Port Types <ul><li>Serial - </li></ul><ul><li>Parallel - </li></ul><ul><li>SCSI - </li></ul><ul><li>USB - </li></ul><ul><li>FireWire - </li></ul><ul><li>IrDA - </li></ul>bits flow in a single line several bits flow at once can connect up to 8 devices, fast data transfer, found on all Macs can connect many devices, has hot swapping capability like USB, higher speed & more $ infrared, line of sight
    12. 12. Motherboard <ul><li>Printed circuit board with connectors </li></ul>slots for adapter cards slots for RAM chips ROM chip CPU
    13. 13. Memory - RAM <ul><li>Stores part of operating system </li></ul><ul><li>Stores part of the application programs </li></ul><ul><li>Stores your files as you work on them </li></ul><ul><li>“ Never too rich, never too thin, never too much RAM” </li></ul>
    14. 14. What kind of memory? Recommendation: Get DDR memory. It will give better performance because it allows for 2 channels between CPU and other parts.
    15. 15. Primary Storage – Hard disk <ul><li>Size in Gigabytes </li></ul><ul><li>Magnetic technology </li></ul><ul><li>Fast access </li></ul>
    16. 16. Secondary Storage - CD/DVD <ul><li>*-R - recordable burn once </li></ul><ul><li>*-RW - rewritable erase and burn again </li></ul><ul><li>650 MB for a CD </li></ul><ul><li>4.7 GB for a DVD </li></ul><ul><li>8.5 GB for Dual Layer DVDs </li></ul><ul><li>In-expensive </li></ul>
    17. 17. Flash memory – USB stick Flash memory is a non-volatile computer memory that can be electrically erased and reprogrammed. It is a technology that is primarily used in memory cards and USB flash drives for general storage and transfer of data between computers and other digital products. Easy to use and fairly inexpensive.
    18. 18. Nostalgic Storage - Floppy Disks write protection tab liner disk spindle hole sector hole plastic casing sliding metal shutter read/write opening
    19. 19. Then and Now 1982 - ABC 80 Made in Sweden 2007 – Macbook Pro Made in China
    20. 20. Specifications The ABC80 <ul><li>3 MHz CPU </li></ul><ul><li>16 kb memory </li></ul><ul><li>No hard disc </li></ul><ul><li>Two big floppies for storage instead </li></ul><ul><li>Monochrome monitor </li></ul>
    21. 21. What’s next? “ When man and machine merge” http://www.box.net/shared/static/az0d7ic6il.pdf

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