This is another military technology brought to the masses. A space-based series of satellites that connect together to provide accurate location detailing, it was developed in '73 so the armed forces could have better navi while overseas. It wasn't until 1996, though, that it became available to us civilians when Billy Clint issued a policy calling for a dual-use GPS system. Fast forward to 2010 and navigation is a billion-dollar industry. No more getting lost in the hood for you.