where is prolog used
does anyone knows any software that uses prolog like an app or any famous algorithm,i know it was used in IBM watson, also is LISP worth learning?
Lisp is a funny language and good one for functional programming, but is not used nowadays. The well-known software AutoCad was made with Lisp! In terms of Prolog, personally, I don't know any software made with it! But it still is a powerfull language because of the backtracking mechanism!