A global distribution system (GDS) is a computerised network system owned or operated by a company that enables transactions between travel industry service providers, mainly airlines, hotels, car rental companies, and travel agencies. The GDS mainly uses real-time inventory (e.g. number of hotel rooms available, number of flight seats available, or number of cars available) from the service providers. Travel agencies traditionally relied on GDS for services, products and rates in order to provide travel-related services to the end consumers. Thus, a GDS can link services, rates and bookings consolidating products and services across all three travel sectors: i.e., airline reservations, hotel reservations, car rentals. GDS is different from a computer reservation system, which is a reservation system used by the service providers (also known as vendors). Primary customers of GDS are travel agents (both online and office-based) who make reservations on various reservation systems run by the vendors. GDS holds no inventory; the inventory is held on the vendor's reservation system itself. A GDS system will have a real-time link to the vendor's database. For example, when a travel agency requests a reservation on the service of a particular airline company, the GDS system routes the request to the appropriate airline's computer reservations system. A mirror image of the passenger name record (PNR) in the airline reservations system is maintained in the GDS system. If a passenger books an itinerary containing air segments of multiple airlines through a travel agency, the passenger name record in the GDS system would hold information on their entire itinerary, while each airline they fly on would only have a portion of the itinerary that is relevant to them. This would contain flight segments on their own services and inbound and onward connecting flights (known as info segments) of other airlines in the itinerary. For example, if a passenger books a journey from Amsterdam to London on KLM, London to New York on British Airways, and New York to Frankfurt on Lufthansa through a travel agent and if the travel agent is connected to Amadeus GDS, the PNR in the Amadeus GDS would contain the full itinerary, while the PNR in KLM would show the Amsterdam to London segment along with the British Airways flight as an onward info segment. Likewise, the PNR in the Lufthansa system would show the New York to Frankfurt segment with the British Airways flight as an arrival information segment. Finally, the PNR in British Airways' system would show all three segments, one as a live segment and the other two as arrival and onward info segments.

1. GDS BASIC
Ashiqul Islam

4. How many airlines operates in Bangladesh?
● List.
● IATA Code.
● IATA Number.
● HUB.
● Origine.
● International Airports.

9. GDS
Global Distribution System.
● Airlines.
● Hotels.
● Car Rental Companies.
● Travel agencies.
It’s Real Time Inventory Management System.

11. GDS

12. Travel Agent
GDS

13. GDS Similarities
Adult Male MR
Adult Female MS
Adult Female if travel with husband MRS
Male Child & Infant MSTR
Female Child & Infant MISS
Child age below 12 years.
Infant age below 2 years.

14. GDS Similarities
Sabre Galileo Amadeus
AVAILABILITY 1 A AN
NAME ENTRY
SURNAME/GIVEN NAME
- N. NM1
AGENT 9 P.T* AP
TICKET TIME LIMIT 7TAW/ T.T* TKOK
RECEIVE 6 R. RF
ER (End & Receive) ER ER ER
IR (Ignore & Retrieve) IR IR IR

15. PNR Cancel
Galileo Sabre Amadeus
XI XI XI
R. 6 RF
ER ER ER
IR IR IR

16. Segment status
Sabre Galileo Amadeus
Seat sell SS HS SS
Hold confirm HK HK HK
Canceled PNR HX HX HX
Unable to
confirm
UC UC UC