Lee.Brownston@A.CS.CMU.EDU (08/05/86)
Write to the Department of Computer Science, Carnegie-Mellon University, Pittsburgh, PA 15213 to request the OPS5 User's Manual. Another source of OPS5 information is "Programming Expert Systems in OPS5" by Brownston, Farrell, Kant, and Martin (Addison-Wesley, 1985).