Charles Matthew "Chuck" Geschke was an American businessman and computer scientist best known for founding the graphics and publishing software company Adobe Inc with John Warnock in 1982, and co-creating the PDF document format with John Warnock.
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Chuck Geschke earned an AB in classics in 1962 and an MS in mathematics in 1963, both from Xavier University.
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Chuck Geschke taught mathematics at John Carroll University from 1963 to 1968.
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Chuck Geschke was a co-author of Wulf's 1975 book The Design of an Optimizing Compiler.
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Chuck Geschke started working at Xerox's Palo Alto Research Center in October 1972.
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In 1978, Chuck Geschke started the Imaging Sciences Laboratory at PARC, and conducted research in the areas of graphics, optics, and image processing.
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Chuck Geschke hired John Warnock, and together they developed Interpress, a page description language that could describe forms as complex as typefaces.
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From December 1986 until July 1994 Chuck Geschke was Adobe's Chief Operating Officer, and from April 1989 until April 2000 he was the company's president.
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Chuck Geschke retired as president of Adobe in 2000, shortly before his partner Warnock left as CEO.
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Chuck Geschke had served as Co-Chairman of the Board of Adobe from September 1997 to 2017.
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Chuck Geschke was released unhurt after being held for four days, although he stated that he had been chained.
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In 1999, Chuck Geschke was inducted as a fellow of the Association for Computing Machinery .
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Chuck Geschke won the 2008 National Medal of Technology and Innovation, awarded by President Barack Obama.
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Chuck Geschke served on the boards of the San Francisco Symphony, the National Leadership Roundtable on Church Management, the Commonwealth Club of California, Tableau Software, the Egan Maritime Foundation, and the Nantucket Boys and Girls Club.
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Chuck Geschke was a member of the computer science advisory board at Carnegie Mellon University.
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Chuck Geschke was a Catholic and met his wife Nancy "Nan" McDonough at a religious conference on social action in the spring of 1961.
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Chuck Geschke's father helped during the early days of Adobe by checking color separation work with his engraver's loupe.
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Chuck Geschke described his father's acknowledgment of the high quality of the halftone patterns as "a wonderful moment".
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Chuck Geschke is survived by his wife, three children and seven grandchildren.
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