Charles “Chuck” Geschke – the co-founder of the large software company Adobe Inc. that helped develop Portable Document Format, or PDF technology – has died at age 81.

Geschke, who lived in the San Francisco Bay Area suburb of Los Altos, died on Friday, the company said.

“This is a huge loss for the entire Adobe community and the tech industry, for whom he has been a guide and hero for decades,” Adobe CEO Shantanu Narayen wrote in a e-mail to company employees.

“As co-founders of Adobe, Chuck and John Warnock developed revolutionary software that revolutionized the way people create and communicate,” said Narayen.

“Their first product was Adobe PostScript, an innovative technology that provided a radical new way to print text and images on paper and sparked the desktop publishing revolution. Chuck has driven the company to relentlessly innovate, which has resulted in some of the most transformative software inventions, including the ubiquitous PDF, Acrobat, Illustrator, Premiere Pro, and Photoshop, ”he added.

His wife said Geschke was also proud of his family.

“He was a famous businessman, the founder of a great company in the United States and around the world, and of course he was very, very proud of it and it was a huge achievement in his life, but that was not his goal – really, his family was, “Nancy” Nan “Geschke, 78, told the Mercury News the Saturday. “He’s always called himself the luckiest man in the world.

After earning a doctorate from Carnegie Mellon University, Geschke began working at the 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 for Technology.

In 1992, Geschke survived a kidnapping, the Mercury News reported.

Arriving at work one morning, two men grabbed Geschke, then 52, at gunpoint and took him to Hollister, Calif., Where he was held for four days.

A suspect caught with $ 650,000 in ransom ultimately led the police to the hideout where he was being held captive, The Associated Press reported.