ICAD (#CorporateHistory: ICAD, Inc., Concentra (name change at #IPO in 1995), KTI (name change in 1998), #DassaultSystèmes (purchase in 2001) is a #knowledgebasedEngineering (KBE) system that enables users to encode design knowledge using a semantic representation that can be evaluated for #Parasolid output. ICAD has an open architecture that can utilize all the power and flexibility of the underlying language.