The travel and tourism sector has emerged as one of the most important sectors for developing as well as developed countries. People from all nations, social rank, professions are potential tourists. Tourism links a worldwide supplier community with consumers, equally distributed worldwide. Its physical and virtual networks enable worldwide travelling, bringing together very distant cultures and habits. The industry is diverse, the size of tourism principals varies from micro to global enterprises. While some are fragmented, other parts, like the airlines, are concentrated into an oligopoly of global alliances. Information systems (IS) have been implemented to development in tourism. The leading edge technology applications: Computer Reservation Systems (CRS) have been among the first international inter-organizational systems.