references

internet

http://en.wikipedia.org/wiki/Output_device

http://www.businessdictionary.com/definition/computer-system.html

http://www.google.com.my/images?hl=en&biw=1189&bih=492&tbs=isch%3A1&sa=1&q=storage+devices&aq=f&aqi=&aql=&oq=


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