Logic Programming was effectively defined as a discipline in the early seventies. It is only during the early to mid eighties that books, conferences and journals devoted entirely to Logic Programming began to appear. Consequently, much of the work done during this first crucial decade in Marseilles, Edinburgh, London, Budapest and Stockholm (to name a few) is often overlooked or difficult to trace. There are now two main regular conferences on Logic Programming, and at least five journals: The Journal of Logic Programming, New Generation Computing, Automated Reasoning, The Journal of...