Airlines have spent heavily to introduce new features such as automated check-in kiosks, real-time luggage tracking and slick mobile apps. But they have avoided the steep cost of rebuilding their reservations systems from the ground up, former airline executives said. Scott Nason, former chief information officer at American Airlines said long-term investments in computer technology were a tough sell when he worked there. “Most airlines were on the verge of going out of business for many years, so investment of any kind had to have short pay-back periods,” said Nason, who left American in 2009 and is now an independent consultant. Get the full story at Reuters