Wednesday, 2 March 2011

Hardware & Software 1.1

Hardware

Input  >>>> RAM <<<>>>Processor>>>>Output
                      ^
                      ^
                      v
                      v
                 Storage

Software

Softare = sets of instructions which tell the system how to do things. These sets of instructions are collected together in workanle groups known as programs.

e.g Operating system, user interface software, translator software, common application.

Operating system provides translating software for itself. Translator software translates high level language in to machine code.

Applications

-Common; used all around the world for single purposes e.g. iPhoto, editing photos

-Generic; used for multiple reasons e.g. word, excel

-Custom; unique scenario, for one task e.g. unique software for unique car. Very costly but you only pay for what you need/want

-Off the shelf; opposite to custom, you pay the developers for all of the software instead of specific required software, however, price is shared between all buyers, help from developers and other users

Utility software allows users to change system

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