Turbo Prolog

Turbo Prolog was marketed in the 80's by Borland. Turbo Prolog was created by the founders of PDC.

Turbo Prolog example codes / programs in internet
Turbo Prolog code can with relative little work be "translated" to Visual Prolog. So the old Turbo Prolog examples which can be found in Internet are worth studying.

Colin Barker*s Turbo Prolog Goodies

Frank Bergmann has several Turbo Prolog examples
 * Chess
 * Queens
 * Tarskies World