 An expert system is a program that answers questions or solves problems about a specific domain of knowledge , using logical rules that are derived from the knowledge of experts . The earliest examples were developed by Edward Feigenbaum and his students . Dendral , begun in 1965 , identified compounds from spectrometer readings . MYCIN , developed in 1972 , diagnosed infectious blood diseases . They demonstrated the feasibility of the approach . 
 An expert system <a href='drop_aux' title='1'><mark>is</mark></a>a program <a href='null_relcl' title='2'><mark>that</mark></a><a href='uninflect' title='3'><mark>answers</mark></a> questions or <a href='uninflect' title='4'><mark>solves</mark></a> problems about a specific domain of knowledge , using logical rules <a href='null_relcl' title='5'><mark>that</mark></a>are derived from the knowledge of experts . The earliest examples <a href='uninflect' title='6'><mark>were</mark></a> developed by Edward Feigenbaum and his students . Dendral , begun in 1965 , identified compounds from spectrometer readings . MYCIN , developed in 1972 , diagnosed infectious blood diseases . They demonstrated the feasibility of the approach . 
An expert system a program answer questions or solve problems about a specific domain of knowledge , using logical rules r derived from the knowledge of experts . The earliest examples was developed by Edward Feigenbaum and his students . Dendral , begun in 1965 , identified compounds from spectrometer readings . MYCIN , developed in 1972 , diagnosed infectious blood diseases . They demonstrated the feasibility of da approach .