Concepts

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Concepts

  1. 1. Concepts of IT <br />
  2. 2. Hardware<br />It refers to the physical components of your computer such as the system unit, mouse, keyboard and monitor.<br />
  3. 3. System Unit Components <br />CPU (Central Processing Unit) or the Processor<br />is the brain of the computer.<br />The faster the CPU, the faster the whole computer. <br />The hard disk drive is the "data center" of your PC. <br />It holds all of your programs and data.<br />The sound card is an expansion card that allows the<br /> computer to send audio information to any compatible <br />audio device such as a set of speakers.<br />The motherboard is the circuit board to which all the other components <br />of the computer connect in some way. <br />All plug into the motherboard's various slots and connectors.  <br />The CPU also plugs into the motherboard via a Slot.<br />RAM (random access memory) <br />is a temporary storage device where files are stored<br />The video card is an expansion card that allows the computer<br /> to send graphical information to a video display device<br /> such as a monitor or projector.<br />
  4. 4. Input/Output Ports<br /><ul><li>Universal Serial Bus (USB)
  5. 5. Parallel Port
  6. 6. Network Port
  7. 7. Serial Port</li></li></ul><li>Computer Performance<br /><ul><li>Memory
  8. 8. Storage
  9. 9. Multitasking
  10. 10. DiskDefragmenting</li></li></ul><li>Memory & storage<br /><ul><li>RAM (Temporary )
  11. 11. CDs , DVDs, Flash memory, Memory Card, Hard Disk Drive (Permanent )</li></li></ul><li>Measurement of storage capacity <br />It is important that you understand a little about the measurements used to define storage capacities.<br /><ul><li>Byte: There are eights bits in a Byte.
  12. 12. KB - Kilobyte: There are 1024 bytes in a KB.
  13. 13. MB - Megabyte: There are 1024 KB in a MB.
  14. 14. GB - Gigabyte: There are 1024 MB in a GB.
  15. 15. TB - Terabyte: There are 1024 GB in a TB.</li></li></ul><li>Input Devices <br />Keyboard, Mouse, Scanners, Web Cam, Microphones<br />Output Devices <br />Screens, Projectors, Printers, <br />Speakers and headphones <br />
  16. 16. Software<br /><ul><li>Operating system is a special type of program which loads</li></ul> automatically when you start a computer.<br />E.g. Windows, Macintosh, Linux<br /><ul><li> Software applications is a type of programs which could be </li></ul> used once the operating system has been loaded.<br />E.g. Microsoft office Word, Computer games<br />

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