http://www.webopedia.com/term/c/computer_system.html
http://www.webopedia.com/TERM/I/input.html
http://www.computerhope.com/jargon/s/stordevi.htm
Book:
• C.T.Bhunia.2005.Information Technology Network and Internet.New Age International Publisher.Daryaganji,New Delhi.
• Muhamad Haziq Lim.2007.Information and Communication Technology(ICT).Venton Publishing.Batu Caves,Selangor Darul Ehsan.