During the 1980's AI was moving at a faster pace, and further into the corporate sector. In 1986, US sales of
AI-related hardware and
software surged to $425 million. Expert
systems in particular demand because of their efficiency. Companies such as Digital Electronics were using XCON, an expert system designed to program the large VAX computers. DuPont, General Motors, and Boeing relied heavily on expert systems Indeed to keep up with
the demand for the computer
experts, companies such as Teknowledge
and Intellicorp specializing in creating software to aid in producing expert systems formed.