the Computing Research Association. Later career In 2002, he moved to Boston to work at MathWorks, where he helped maintain the front end of the MATLAB programming language, for which he also built a lint product called M-Lint. He had met MathWorks founder Cleve Moler while working at a Silicon Valley startup and developed a "long-distance consulting relationship" with him in the 1990s. Johnson currently lives in Morgan Hill, California and works on machine learning at Wave Computing, a startup that develops energy-efficient computers for machine learning. References Unix people Scientists at Bell Labs Living people 1944 births