Patrick Tehan/MediaNews Group/The Mercury News via Getty John Warnock, the co-founder of Adobe Systems who helped invent the PDF, has died, the tech company announced Sunday. He was 82.

John Warnock, the co-founder of Adobe, passed away on Saturday at the age of 82. "It is with profound sadness that Adobe shares the passing of the company's beloved co-founder Dr. John Warnock ...

The traditional Portable Document Format (PDF) format was developed in 1993 by John Warnock of Adobe. The developer was frustrated by computers that distorted the graphic design of different files ...

The legendary John Warnock forever changed the way we communicate Adobe co-founder, John Warnock, passed away at 82. Watch: How Adobe Illustrator Changed Graphic Design A video tells the story of ...