ICT HARDWARE

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  • Hardware
    • Processing
      • At heart of a computer system is the CPU (Central Processing Unit)
        • CPU's job is to perform all instructions and calculations required for the computer to function
          • Comes in form of a silicon chip, known as a Microprocessor
      • The Motherboard is a PCB (Printed Circuit Board)
        • Holds many of the systems vital components including the CPU
    • Input and Output Devices
      • Input
        • Allows users to enter data into a system
      • Output
        • Allow system to transfer or display (output) data
    • Internal Memory
      • Computers need to hold information when they are working.
        • Two Types of Internal Memory:
          • ROM (Read Only)
            • Contains the commands that are designed to be read only, such as the system's boot up instructions
          • RAM (Random Access)
            • Data is stored in the memory temporarily and is lost when PC is switched off
    • Backing Storage
      • Computers need to store files after they have been switched off.
        • Most common device used for this is a Hard Drive
      • External Hard Drives are used to transfer data between systems
        • Including Memory Sticks and CD/DVDs
  • ICT REVISION

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