Bibliography

Human

http://www.putlearningfirst.com/language/01origin/01origin.html

http://deafness.about.com/cs/featurearticles/a/signhistory.htm

http://www.bodylanguagetraining.com/

http://www.handspeak.com/

drums

 www.virtuallibrary.com

Technology

http://electronics.howstuffworks.com/bluetooth.htm

http://livinginternet.com/e/ei.htm

http://computer.howstuffworks.com/encryption.htm

http://electronics.howstuffworks.com/fax-machine.htm

http://computer.howstuffworks.com/firewall.htm

http://computer.howstuffworks.com/pc1.htm

http://electronics.howstuffworks.com/tv.htm

http://www.bbc.co.uk/history/historic_figures/baird_logie.shtml

http://www.electricscotland.com/history/other/john_logie_baird.htm

http://electronics.howstuffworks.com/satellite-tv.htm
 

http://electronics.howstuffworks.com/ringtone2.htm

http://electronics.howstuffworks.com/telephone-image.htm

http://electronics.howstuffworks.com/cable-tv.htm

http://electronics.howstuffworks.com/cordless-telephone.htm

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