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by cyanoacry 4813 days ago
A similarly described SABRE outage in 1989 seems to have caused minimum trouble, because they had the real capability to work off-line with paper:

http://www.nytimes.com/1989/05/13/us/computer-chaos-for-air-...

> Apparently, no information about reservations and other travel plans was lost, and American said there were no serious disruptions of its 2,300 daily flights.