I supported two Senior Account Managers on the West coast, one in San Francisco, and one in LA selling artificial intelligence development solutions on souped up PCs, as opposed to proprietary LISP machines i.e. LMI, Symbolics, Inference.
My role was to field basic initial technical questions regarding the use of LISP to develop varieties of applications such as expert systems.
The artificial intelligence industry was as high-flying, albeit less popularized, as the dot-com movement decades later. There was also an "AI bust" from which few of the companies survived.
There are a few large-scale industrial applications of LISP which remain virtually unknown, such as ITA Software's airline reservation system. ITA was founded by members of MIT's AI Lab. They've replaced most of the legacy reservation mainframes with PC based LISP machines.