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John Durbetaki

Co-founder of OrCAD


In 1984, John Durbetaki began designing an expansion chassis for the IBM PC. Durbetaki, who had left Intel Corp. after five years as an engineer and project manager, decided, along with brothers Keith and Ken Seymore, to start his own company to develop add-on instrumentation for the PC.
An October 1984 entry in Durbetaki’s notebook, illustrates his lack of enthusiasm for drawing everything by hand as well as gives a glimpse of the future: “We need a CAD program to do our own design work.”


  • John Durbetaki Founded OrCAD in 1985
    • Co-founders were brothers Ken Seymour and Keith Seymour