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"For more than two years, the disappearance of Air France Flight 447 over the mid-Atlantic in the early hours of June 1, 2009, remained one of aviation's great mysteries. How could a technologically state-of-the art airliner simply vanish? "

This article presents us the feedback system of the airplane's autopilot. According to the reliable source of wikianswers, feedback is when The input is adjusted based on the output of the system so as to achieve a certain end, like minimizing disturbance, cancelling echo (in a speech system) and so on. http://wiki.answers.com/Q/What_is_a_feedback_system#ixzz1jUMOZkrU Here is how the autopilot system works: Through the various sensors and measuring instruments located in the body of the airplane, data such as "such as groundspeed, altitude, engine settings, and rate of climb" is logged in real-time. This data is sent to the processor of the pilot's computer It is then processed and the computer stipulates what controls to actuate in order to stabilise flight "The Airbus is a fly-by-wire plane; the control inputs are not fed directly to the control surfaces, but to a computer, which then in turn commands actuators that move the ailerons, rudder, elevator, and flaps." (the processor requests the output controls to be carried out)

Also, here's a link to another article explaining about how google's self-driving car works.

I'm a bit curious Jorge, how would this invade the privacy of some? This is an amazing technological improvement, it will be interesting to see what happens in the future with this. This is a quite good article on how it works http://news.discovery.com/autos/how-google-self-driving-car-works-111018.html

Because the car records it's position using the GPS, if a black hacker is able to get hold of this information the owner of the car could be put at risk.

"Google tests cars that drive themselves"

This is a good system since cars that drive themselves will decrease danger in the road. They're programmed and don't have the problem of "drinking and driving" like humans do. This is an advantage because it will reduce danger. Plus, it will increase time for leisure since people can be socializing with people or doing work instead of driving.

Here is a link to one of google's self driving cars. http://articles.businessinsider.com/2012-02-24/tech/31094289_1_sergey-brin-google-car

"How Baggage Handling Works"