Editing Knowledge-based systems (section)

===Widening of application===
In the 1980s and 1990s, in addition to expert systems, other applications of knowledge-based systems included real-time process control,<ref>{{Cite journal |last=Larsson |first=Jan Eric |last2=Hayes-Roth |first2=Barbara |author-link2=Barbara Hayes-Roth |date=1998 |title=Guardian: An Intelligent Autonomous Agent for Medical Monitoring and Diagnosis |url=http://dblp.uni-trier.de/rec/bibtex/journals/expert/LarssonH98 |journal=IEEE Intelligent Systems |volume=13 |issue=1 |access-date=2012-08-11}}</ref> intelligent tutoring systems,<ref>{{Cite book |last=Clancey |first=William |title=Knowledge-Based Tutoring: The GUIDON Program |date=1987 |publisher=The MIT Press |location=Cambridge, Massachusetts}}</ref> and problem-solvers for specific domains such as protein structure analysis,<ref>{{Cite conference |last=Hayes-Roth |first=Barbara |author-link=Barbara Hayes-Roth |last2=Buchanan |first2=Bruce G. |last3=Lichtarge |first3=Olivier |last4=Hewitt |first4=Mike |last5=Altman |first5=Russ B. |last6=Brinkley |first6=James F. |last7=Cornelius |first7=Craig |last8=Duncan |first8=Bruce S. |last9=Jardetzky |first9=Oleg |date=1986 |title=PROTEAN: Deriving Protein Structure from Constraints |url=http://dblp.uni-trier.de/rec/bibtex/conf/aaai/Hayes-RothBLHABCDJ86 |conference=AAAI |pages=904–909 |access-date=2012-08-11}}</ref> construction-site layout,<ref>{{Cite book |editor=Robert Engelmore |display-editors=et al|title=Blackboard Systems |date=1988 |publisher=Addison-Wesley Pub (Sd)}}</ref> and computer system fault diagnosis.<ref>{{Cite conference |last=Bennett |first=James S. |date=1981 |title=DART: An Expert System for Computer Fault Diagnosis |conference=IJCAI}}</ref>