That's mainly because Philips also offered a high-end high quality audio range at that time, the popular '900 series', and Philips in Europe didn;t want the CD-i 910 to be confused to be part of this 900 series. So that's why they renamed the 910 into 205 in Europe. The only question remains is why Philips named the first CD-i player in USA the CD-i 910! We've never read or found any clues why Philips chose for this kind of numbers. It seems however that Philips didn't make up his mind yet of how all the CD-i players were called, as the 910 doesn't really fit into the scheme. The 3xx were reserved for portable players, the 2xx for high-end audio-module sized CD-i players. The 4xx was meant for the compact CD-i players; the 6xx was used for the professional players.