A screenshot from a 2015 video interview, titled Oral History of Dennis R. Austin, that was published by the Computer History Museum. | Screenshot: Wes Davis / The Verge

Dennis Austin, who co-created PowerPoint, passed away at his home in Los Altos, California, on September 1st, reports The Washington Post. His son, Michael Austin, said he’d had lung cancer that had metastasized to his brain, according to the Post. He was 76 years old.

Austin studied engineering at several universities, including MIT and UC Santa Barbara, before going to work as a software developer, eventually joining the software company Forethought and co-developing PowerPoint. The company released the software in 1987, and Microsoft bought the company just a few months later. Austin served as PowerPoint’s primary developer from 1985 to 1996 when he retired.

The Washington Post notes that Michael Gaskins, PowerPoint’s other…

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