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Fundamentals

Fundamentals. Contents. What is a Computer Functions of Computer Input Device of a Computer Output Device of a Computer System Unit of a Computer Components of a Computer Storage of a Computer Floppy Disc Hard Disc of a Computer Compact Disc of a Computer

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Fundamentals

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  1. Fundamentals

  2. Contents • What is a Computer • Functions of Computer • Input Device of a Computer • Output Device of a Computer • System Unit of a Computer • Components of a Computer • Storage of a Computer • Floppy Disc • Hard Disc of a Computer • Compact Disc of a Computer • Why is a Computer So Powerful?

  3. What is a Computer A computer is an electronic machine that accepts data, stores and processes data into information. The computer is able to work because there are instructions in its memory directing it. The parts of the computer that you can see and touch, such as the keyboard, monitor and the mouse are called hardware. The instructions that direct the computer are called software or computer program. Data which is raw facts that you the user enter into the computer is called input. This includes; words, numbers, sound and pictures. When the data is entered into the computer, the computer processes the data to produce information which is output. For example, you enter 2+2 into the computer as data, the computer processes it and the result is 4 which is information. Back

  4. Functions of Computer • Input • Process • Output • Storage Processor Control Unit/Arithmetic Logic Unit Input Devices Output Devices Memory Back Storage Devices

  5. Input Device of a Computer • What is an input device? Hardware used to enter data and instructions Back

  6. Output Device of a Computer • What is an output device? Hardware that conveys information to a user Back

  7. System Unit of a Computer • What is the system unit? Box-like case containing electronic components used to process data Back

  8. Components of a Computer • What are two main components on the motherboard? Central Processing Unit (CPU) • Also called a processor • Carries out instructionsthat tell computer what to do Memory • Temporary holding place for data and instructions Back

  9. Storage of a Computer • What is storage? Holds data, instructions, and information for future use Storage media • Physical material on which data, instructions, and information are stored Storage device • Records and retrieves items to and from a storage medium Back

  10. Floppy Disc • What is a floppy disk? Thin, circular, flexible disk enclosed in rigid plastic shell A Zip disk looks similar but has much greater storage capability (=170 floppy disk) Back

  11. Hard Disc of a Computer • What is a hard disk? Provides much greater storage capacity than a floppy disk or Zipdisk Housed inside the system unit Back

  12. Compact Disc of a Computer What is a compact disc? Flat, round, portable metal disc • CD-ROM • CD-RW Capacity: 673~768 MB • DVD-ROM • DVD+RW Capacity:4.7 ~ 17.1 GB Back

  13. Why is a Computer So Powerful? • Speed • Reliability • Accuracy • Storage • Communications Back

  14. Thank you

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