Also, a bit of trivia: AA invented Sabre. Sabre can actually trace itself back to AA's first attempts at using computerized business process automation in the 1950s, before it was spun off into a separate company in 2000.
A really interesting book I read about this is Hard Landing by Thomas Petzinger Jr. This contains more than just a history of Sabre. I read it more because I work in the travel industry ;-)
Should anyone be bored enough for a read, I actually think SABRE's history is sort of interesting: http://en.wikipedia.org/wiki/Sabre_(computer_system)