FILE – Portrait of John Warnock, from Adobe Systems Inc., at the annual PC Forum, Palm Springs, California, March 19-22. (Ann E. Yow-Dyson/Getty Images)

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. source