Today, three main players still dominate the North American and European global travel distribution system landscape: Amadeus, Sabre, and Travelport. Amadeus is the largest player in the travel agent air booking market, with a self-reported 43.5 percent market share in Q1 2017, followed closely by Sabre’s 36.3 percent. They also offer travel technology services like airline information technology products, travel agent interfaces for connecting to their global distribution system network, and revenue management tools for hotels and airlines to help price and merchandize their products. These three companies make the bulk of their money off air bookings; in particular, they earn huge margins by charging license fees, service fees, and transaction fees for bookings and access to their networks. Hotel bookings comprise a small portion of their booking business, about 10 percent, due to the complexity and fragmentation in the global hotel distribution marketplace. Get the full story at Skift Read also "So much airline tech talk is ‘nonsense’, says GDS chief" at Travel Weekly UK