Sabre Travel Network is the global business-to-business travel marketplace. It is used by a wide range of travel suppliers including around 400 airlines, 125,000 hotels.
Galileo is the masterpiece of Travelport. It’s classy global reservation, business management and productivity system, used to book airlines, trains, hotel rooms, cruises, car rental, and so on.
Amadeus is one of the most popular GDS systems in the travel industry and was created by a joining together of Air France, Lufthansa, Iberia Airlines, Scandinavian Airlines System.