Factory sealed XPER Knowledge Base Expert System software package by Abacus with 5.25" floppy disk.  NOS (New Older Stock).  For the Commodore 64 computer and the Commodore 128 computer (in 64 mode).  Shrink wrap has a minor tear at the top of the package but not torn enough that the contents could have been removed or used.  Very rare but powerful item!  See photos.  For more details about the amazing features this software has please view the photo of the back cover.  Designed by Dr. Jacques Lebbe.  This software can greatly aid in decision making, classification, brainstorming, information searching and diagnosis.  Allows user to classify information into hierarchy tree branch relationships.  May also have some features resembling AI (artificial intelligence).  May reflect some of the foundations of early historical efforts towards Artificial Intelligence (AI).  Thus, software like this might represent part of the history of artificial intelligence (AI) to a certain extent.

Definition of an Expert System:
  1. A piece of software programmed using artificial intelligence techniques. Such systems use databases of expert knowledge to offer advice or make decisions in such areas as medical diagnosis and trading on the stock exchange.