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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.
Before the introduction of SABRE, the airline's system for booking flights was entirely manual, having developed from the techniques originally developed at its Little Rock, Arkansas, reservations center in the 1920s. In this manual system, a team of eight operators would sort through a rotating file with cards for every flight.
Their idea of an automated airline reservation system (ARS) resulted in a 1959 venture known as the Semi-Automatic Business Research Environment (SABRE), launched the following year. [8] By the time the network was completed in December 1964, it was the largest civil data processing system in the world. Other airlines established their own systems.
The departure control system (DCS) is the system used by airlines and airports to check-in a passenger. The DCS is connected to the reservation system enabling it to check who has a valid reservation on a flight. The DCS is used to enter information required by customs or border security agencies and to issue the boarding document.
Galileo is a computer reservations system (CRS) owned by Travelport.As of 2000, it had a 26.4% share of worldwide CRS airline bookings. [1] In addition to airline reservations, the Galileo CRS is also used to book train travel, cruises, car rental, and hotel rooms.
Programmed Airline Reservations System (PARS) is an IBM proprietary large scale airline reservation application, a computer reservations system, executing under the control of IBM Airline Control Program (ACP) (and later its successor, Transaction Processing Facility (TPF)). Its international version was known as IPARS. [1]