Originally Posted by
cheltzel
I believe that TK does not have any of the commercially marketed reservation systems on its back end. I think they have a home grown one with an Amadeus front end, or something like that.
This is at least partially correct--not sure whether they have any Amadeus at all. Regardless, whatever system they use is extremely unfriendly and incompatible with other airline systems, including Amadeus and UA Shares.