Wednesday, 2 March 2011

Hardware Software

Everything that happens in a computer goes from:
Input - Processor - Output         
             //
       Storage

The CPU infact does not connect directly with the hard drive but instead with the RAM stick. As trying to connect the CPU to hard drive is like talking to someone from a jet plane to a bike.

Software:
Software = sets of instructions which tell the system how to do something. These instructions are collected together in a workable group which is called a program.

Operating system
  • User interface software
    • Provides a GUI
    • Provides a Platform for apps top go on it
    • Middle ,am between apps and hardware i.e. Word does not know anything about printers but OS does.
  • translate software (TS)
    • An OS provides its own TS
    • Translate high level language into Machine 'Code' - Source code to the object code
  • Untilities
    • Allows you to change the system to a certain extent
  • Applications
    • Common Applications (Any app that is used around the world
      • iPhoto
      • MYOB
    • Genetic Applications (Any piece of software that is used for multiple applications)
      • Word
      • Power Point
    • Custom Software (unique, it is only written for a unique task)
    • Off the Shelf Software (bought from a shop)
      • Downside
        • Paying for all the software you don't use

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