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United Airlines, Inc. is a major airline in the United States headquartered in Chicago, Illinois. [3] United operates an extensive domestic and international route network across the United States and all six inhabited continents [10] primarily out of its seven hubs, with Chicago–O'Hare having the largest number of daily flights [11] and Denver carrying the most passengers in 2023. [12]
Since airline reservation systems are business critical applications, and they are functionally quite complex, the operation of an in-house airline reservation system is relatively expensive. Prior to deregulation [ clarification needed ] , airlines owned their own reservation systems with travel agents subscribing to them.
United Airlines and Trans World Airlines followed in 1971 with the Apollo Reservation System and Programmed Airline Reservation System (PARS), respectively. Soon, travel agents began pushing for a system that could automate their side of the process by accessing the various ARSes directly to make reservations.
Galileo traces its roots back to 1971 when United Airlines created its first computerized central reservation system under the name Apollo. During the 1980s and early 1990s, a significant proportion of airline tickets were sold by travel agents. Flights by the airline owning the reservation system had preferential display on the computer screen.
Sabre Global Distribution System, owned by Sabre Corporation, [1] is a travel reservation system used by travel agents and companies to search, price, book, and ticket travel services provided by airlines, hotels, car rental companies, rail providers and tour operators.
Further contact details, such as agency phone number and address, additional phone contact numbers at passenger address and intended destination. Age details if it is relevant to the travel, e.g., unaccompanied children or elderly passengers requiring assistance. Frequent flyer data. Seat allocation (or seat type request).
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