Bibliography.

http://smallbusiness.chron.com/iphone-benefits-63966.html
https://sites.google.com/site/itasticiphone/affects-on-society
http://en.wikipedia.org/wiki/Cotton_gin
http://inventors.about.com/od/cstartinventions/a/cotton_gin.htm
http://en.wikipedia.org/wiki/Flying_shuttle
http://www.britannica.com/EBchecked/topic/211694/flying-shuttle