BA decided in Nov 1999 to outsource their reservations & departure control systems (along with many others run on the same systems). In April 2000 they decided to go with Amadeus, a large European CRS (Computer Reservation System). In July 2001 they cut over to using Amadeus Fares instead of Galileo Fares. In Nov 2001 they moved the hardware to the Amadeus datacentre in Germany. On 24th Feb 2002 they switched over to using Amadeus for all their bookings. It's the biggest IT change BA has done in their entire history and has gone amazingly well considering the changes involved. Whether it was the correct thing for BA to do will only be found out in the years to come.