Some company have back offices that they've spent considerably more on. Airline companies for instance may have a tool that lets the person at the gate check who that person is, what their deal is, etc. And then GDPR happened and the bill to ensure that every rule is followed to the letter and suddenly 2M€ isn't that bad after all...
No, they use Amadeus.
Amadeus is a wonderful mainframe program that perfectly and with 100% accuracy faithfully models how you'd book a train ticket in France in the fifties.
