computer systems harware

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  • Created by: Georgina
  • Created on: 13-02-15 10:20
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  • Computer Hardware
    • What is it ?
      • Provide the physical mechanisms to...
        • Input + output data
        • manipulating data
        • electronically controlling various input, output + storage
    • Compnonents
      • CPU - Central Processing Unit
        • Comprised of 3 primary sub-units
          • 1) ALU - Arithmetic Logic unit
            • Performs arithmetic and boolean logical operations
          • 2) The control Unit
            • control the processing of instructions and the movement of internal CPU data from one register to another
          • 3) The interface unit
            • move program instructions and data between the CPU and other hardware components
      • Storage
        • Hard disk
        • CD/DVD
        • USB flash stick
        • memory space in server
      • Input devices
        • Keyboard
        • mouse
        • storage units
      • Output devices
        • monitor
        • printer
        • speaker
        • storage units
      • Buses
        • physical connection that makes it possible to transfer data from one location in the computer system to another
      • Internal memory
        • RAM - Random access memory
        • ROM - Read only memory
      • architecture
    • Key points
      • Performance + costs = Key when designing systems

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