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John Warnock, who helped invent the PDF and co-founded Adobe Systems, has died.

John Warnock, who helped invent the PDF and co-founded Adobe Systems, has died. He was 82. The company said in a statement that the Silicon Valley entrepreneur and computer scientist died Saturday surrounded by family. It didn't give the cause of death or say where Warnock died. Warnock was working at Xerox in the late 1970s when he came up with a printing and graphics protocol. When Xerox balked, Warnock and colleague Charles Geschke created their own company, Adobe Systems. Software creat...

John Warnock, who invented the PDF and co-founded Adobe Systems, has died at the age of 82. The...

The self-described "mediocre" student went to work at IBM after a summer job at a tire shop.

John Warnock, who helped invent the PDF and co-founded Adobe Systems, has died. He was 82.

Other programmes, such as Adobe Illustrator and Photoshop, followed before Mr Warnock stepped down as CEO in 2000.

SALT LAKE CITY (AP) — John Warnock, who helped invent the PDF and co-founded Adobe Systems, has died. He was 82. The Silicon Valley entrepreneur and computer scientist died Saturday surrounded by family, Adobe said in a statement. The company didn’t give a cause of death or say where Warnock died. “John’s brilliance and innovations […]

Adobe Systems co-founder said he was a "mediocre" student until a high school teacher got him to love math.

Other programmes, such as Adobe Illustrator and Photoshop, followed before Mr Warnock stepped down as CEO in 2000.