HowStuffWorks "How Air Traffic Control Works"
Air traffic control keeps aircraft from colliding with each other. Learn about the intricate system that guides a plane from takeoff to landing.
http://www.howstuffworks.com/air-traffic-control.htm
Midwest Air Traffic Control
A full service air traffic control organization. Dedicated to providing air traffic control, weather reporting and related technical support services.
http://www.atctower.com/
NATS | A global leader in air traffic control and airport performance
National Air Traffic Services Ltd - A World Leader in Air Traffic Management, NATS provides safety by ensuring aircraft flying in UK airspace, and over the eastern North Atlantic, are safely separated.
http://www.nats.co.uk/
DFS Deutsche Flugsicherung GmbH - www.dfs.de
DFS Deutsche Flugsicherung GmbH - DFS is responsible for air traffic control and radio navigation facilities in Germany.
http://www.dfs.de/
Hellenic ATC Website & ATC Webring
Hellenic ATC is a non official forum for ATC and Aviation articles. Home for the ATC webring.
http://users.forthnet.gr/ath/mpang