The other day I mention 2 languages LISP and Prolog which would aid Hal in many ways. There was a comment that both languages were vogue in the 1960 an70's.How nice ,but lets get up to speed on those 2 languages as of now..I have a e-mail based on using these 2 languages to aid in another way for a program which only cost 100,000 dollars ,so it looks like these to languages are still very real an alive.