H. Penny Nii
In this chapter we focus on tools for building expert systems, and on the associated R&D infrastructure. The types of tools currently on the market are indicative of the current technology available to the end user community, while tools under development can provide clues about the kinds of applications one can expect in the future. The level of activity of tool development also indicates the value being placed on the future of this technology. We get at this, in part, by profiling some key ES development tools and leading-edge players in the market.