I am involved in design of both expert system shells and expert systems on PC/AT and Symbolics-3600 series. Please add me to your mailing list. Please send any recent info you have r about: Gold Hiill LISP, Symbolics Common Lisp , or Kyoto Common LISP. David Loewenstern Naval Air Development Center code 7013 Warminster, PA 18974-5000 <dml@nadc.arpa>