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Information technology is a generic term. In fact there is a system of information technologies. The largest and most important information systems in the tourism sector are the computer reservation systems. The US Department of Transportation defines a CRS as 'a periodically updated central data base that is accessed by subscribers through computer terminals'. They have emerged as the dominant technology.
Computer reservation systems (CRSs) were developed by the airlines. They are primarily tools used by airlines to maintain inventory control of their seat offerings. They have played a significant role in facilitating increasing volumes of travel over the last two decades. A significant shift is now occurring towards global distribution systems (GDS) and increased competition amongst airline groups seeking to broaden and strengthen their product distribution through developing regional global CRSs. A GDS takes the inventory from a CRS (or from many of them)......
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