Computer hardware

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  • Data The words, numbers, figures, sounds, and graphics that describe people, events, things, and ideas
  • Computer hardware

    1. 1. COMPUTER HARDWARE
    2. 2. Then and Now ENIAC (The Electronic Numerical Integrator And Calculator) 1946-2-14 Made In USA
    3. 3. Then and Now 1982 - ABC 80 Made in Sweden Now – Macbook Pro Made in China
    4. 4. What is a computer? <ul><li>An electronic machine that can be programmed to accept data (input), and process it into useful information (output). Data is put in secondary storage (storage) for safekeeping or later use. </li></ul>
    5. 5. Computer Systems <ul><li>Hardware </li></ul><ul><ul><li>All the Physical parts of a Computer System (the bits that you can see and touch) </li></ul></ul><ul><li>Software </li></ul><ul><ul><li>Software is a collection of programs that help the computer hardware to work properly </li></ul></ul>
    6. 6. Computer work Central Processing Unit Output Input Memory Storage Data Data Data Data
    7. 7. Input Devices <ul><ul><li>Keyboard </li></ul></ul><ul><ul><li>Touch-Sensitive Screen </li></ul></ul><ul><ul><li>Mouse </li></ul></ul><ul><ul><li>Microphone </li></ul></ul><ul><ul><li>Digital Camera </li></ul></ul><ul><ul><li>Digital Video Camera </li></ul></ul><ul><ul><li>Joystick </li></ul></ul><ul><ul><li>Scanner </li></ul></ul>The Physical Parts of a Computer System which allows data to be entered into a Computer System
    8. 8. keyboard <ul><li>Used to input textual information to the computer. </li></ul>
    9. 9. mouse <ul><li>Lets you feed instructions to the computer by simply pointing and clicking in a graphical environment. </li></ul>
    10. 10. Scanner <ul><li>A scanner is a device that can read text or illustrations printed on paper and translate the information into a form the computer can use. </li></ul>
    11. 11. Output Devices <ul><li>An output device is a device which allows data to be displayed or passed out of a computer system </li></ul><ul><li>Printers </li></ul><ul><li>Monitor </li></ul><ul><li>Load speaker </li></ul><ul><li>Projector </li></ul>
    12. 12. Monitor <ul><li>Screen that displays what is going on in the computer. </li></ul>
    13. 13. Printer <ul><li>a printer is a peripheral which produces a hard copy of documents stored in electronic form, usually on physical print media such as paper or transparencies. </li></ul>
    14. 14. Headphone <ul><li>Used to deliver the sounds. </li></ul>
    15. 15. Memory Devices <ul><li>RAM </li></ul>
    16. 16. Random-Access Memory <ul><li>Allows computers to store and retain information </li></ul>Stores part of operating system Stores part of the application programs Stores your files as you work on them
    17. 17. Storage Devices <ul><li>We require backing storage to store programs and files </li></ul><ul><li>Without backing storage all our data would be lost when we turn the computer off </li></ul>Backing Storage Media Hard Disk Floppy Disk CD-ROM DVD-ROM USB Stick
    18. 18. Primary Storage – Hard disk <ul><li>Size in Gigabytes </li></ul><ul><li>Magnetic technology </li></ul><ul><li>Fast access </li></ul>A hard disk is a memory used mainly in computers.
    19. 19. 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>
    20. 20. Flash memory – USB stick <ul><li>Flash memory is a non-volatile computer memory that can be electrically erased and reprogrammed. </li></ul>
    21. 21. The Processor <ul><li>The processor or C entral P rocessing U nit is the brain of the computer </li></ul><ul><li>The performance of the processor is measured in Giga Hertz (GHz) </li></ul><ul><li>We send programs to the processor to get the computer to do something </li></ul>
    22. 22. Thank you! <ul><li>We are computer hardware a simple introduction </li></ul><ul><li>We hope you have some Harvest </li></ul>

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