Abstract: An artificial intelligent expert system design that integrates multi-tasking capabilities to allow more than one user to interface with a rule or knowledge base at one time without the need for adding additional hardware for each instance of use, or the need to load multiple rule base information for each user. In addition, the system can carry on interactive sessions with users while, at the same time, supporting sessions with the main system keyboard and screen. Additional provisions may be provided to allow information to be delivered to users in more than one language, further broadening the applicational use of the expert system. All users share a common rule base of knowledge, and when they interact with the system, their answers are segregated from each other, along with unique data information. The inference engine, being multi-tasking, manages all users positions within the rule base and coordinates data management between the users and the rule base.