Did you know this?

 The first mouse was invented by Douglas Engelbart . He invented this only after 11 years of military design!!!.He developed a gadget made with a wooden baseusing two wheels to roll back and forth and by the way this was the first mouse that could fit into a user's hand!

Check for more details : http://mashable.com/2012/10/05/mouse-history/

http://thechive.com/2012/03/29/20-facts-about-technology-that-might-surprise-you-20-photos/20-interesting-facts-about-technology-3/