After looking at the social networking websites i've decided to look at the other main part of my project, GPS.
Once again i thought i would check out the history of the device, i examined this subject for another project, so i know a little about the history already.
This is a link to a pretty decent timeline on GPS.
http://www.aero.org/education/primers/gps/gpstimeline.html
Interesting to see how it was developed by the US military, not very surprising though!
