TRILOGY probably doesn't exist as a product. The original product was
developed by a professor at University of British Columbia. His product was
incomplete and buggy. He sold the rights to another company which pur out
a version called TRILOGY VS, but the partners could never make it commercially
complete, and they went broke. One of the pricipals is now a stockbroker who
told me that he has several hundred copies of TRILOGY VS in his basement, and
that he had lost $50K on the venture. The professor of course did quite well.
I had spokent ot him also. He issued flyers announcing a new vesion of TRILOGY,but he has since went to Czechoslovakia (his home country) and has never issued
the product. All this is quite unfortunate, because its could have been quite amazing. However, a company called Transpower Corporation, 1 Oak Drive,
Parkerford, Pennsylvania 19457, USA puts out a similar product called Expert
Thinker for $149. It's written in Turbo Prolog and either assembler or C.