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There is one major Regional GDS, Abacus, serving the Asian market and a number of regional players serving single countries, including Travelsky (China), Infini and Axess (both Japan) and Topas (South Korea). Today, the GDS are run by independent companies with airlines and travel agencies being major subscribers.Īs of February 2009, there are only four major GDS providers in the market: Amadeus, Travelport (which operates the Apollo, Worldspan and Galileo systems), Sabre and Shares. Prior to deregulation, airlines owned their own reservation systems with travel agents subscribing to them. 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. Message construction standards set by IATA and ICAO, are global, and apply to more than air transportation. These messaging types are called Type A for real time interactive communication and Type B for informational and booking type of messages.

Travel agencies and other indirect distribution channels access the same GDS as those accessed by the airline reservation systems, and all messaging is transmitted by a standardized messaging system that functions on two types of messaging that transmit on SITA's high level network (HLN). The second type of direct distribution channel are consumers who use the internet or mobile applications to make their own reservations. An airline's direct distribution works within their own reservation system, as well as pushing out information to the GDS.

3 Availability display and reservation (PNR)Īirline reservation systems incorporate airline schedules, fare tariffs, passenger reservations and ticket records.

A computer reservation system is used for the reservations of a particular airline and interfaces with a global distribution system (GDS) which supports travel agencies and other distribution channels in making reservations for most major airlines in a single system. ARSs are part of passenger service systems (PSS), which are applications supporting the direct contact with the passenger.ĪRS eventually evolved into the computer reservations system (CRS). It contains information on schedules and fares and contains a database of reservations (or passenger name records) and of tickets issued (if applicable).

JSTOR ( February 2015) ( Learn how and when to remove this template message)Īirline reservation systems ( ARS) are systems that allow an airline to sell their inventory (seats).

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