The explosive growth of this ratio was driven initially by the creation and utilization of robotic software and, more recently, by the rapid growth of consumers' multi-site shopping behavior on the Internet.
With the advent of general public access to the internet, many hotel, airlines and other travel companies began to sell directly to passengers. As a consequence, airlines no longer needed to pay the commissions to travel agents on each ticket sold. Since 1997, travel agencies gradually became victims of disintermediation, the reduction in costs caused by removing layers from the package holiday distribution network.
Many travel agencies have developed an internet presence by posting a website, with detailed travel information. Full travel booking sites are often complex, and require the assistance of outside travel technology solutions providers such as Travelocity, Patheo and Open Fares. These companies use travel service distribution companies who operate Global Distribution Systems (GDS), such as Sabre Holdings, Amadeus and Worldspan, to provide up to the minute, detailed data on tens of thousands of flight, hotel, and car rental vacancies.