Recently, researches concerning the computer-assisted organic synthesis design are attracted. Constructing the system is very interesting problem as the application of knowledge engineering. Since chemist Corey has been developed the OCSS and LHASA as such system, several systems have been developed by many reserchers. However, the detailes of the systems can not be opened to the public.
The authors try to development of the original organic synthesis design supporting system based on LHASA and present the fundamental framework of the system. This system runs in ACOS-6 through the use of color graphic display (NEC N6940). Each module is written in proper language, LISP and FORTRAN.