Charles "Chuck" Geschke – the co-founder of the major software company Adobe Inc. who helped develop Portable Document Format technology, or PDFs – has died at age 81.
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Geschke, who lived in the San Francisco Bay Area suburb of Los Altos, died Friday, the company said.
"This is a huge loss for the entire Adobe community and the technology industry, for whom he has been a guide and hero for decades," Adobe CEO Shantanu Narayen wrote in an email to the company's employees.
After earning a doctorate from Carnegie Mellon University, Geschke began working at Xerox Palo Alto Research Center, where he met Warnock, the Mercury News reported. The men left the company in 1982 to found Adobe, developing software together.
In 2009, President Barack Obama awarded Geschke and Warnock the National Medal of Technology.
