The European Commission has opened a second phase in-depth investigation into the planned acquisition of Worldspan by Travelsport. Both companies are active in the marketing and distribution of travel services through their respective Global Distribution Systems (GDS). A GDS is a computerised system used to process, store and retrieve information for the sale of travel and travel related products. There are four GDSs operating on a global basis: Amadeus, Galileo owned by Travelsport, Sabre and Worldspan. The proposed transaction would combine the second and the fourth largest GDSs in the EU. The in-depth investigation will enable the Commission to assess whether the reduction in the number of competitors in what the Commission considers to be a highly concentrated market would result in anti-competitive effects that harm consumers. A decision is expected to be adopted by 13 September 2007.