John Warnock, who helped invent the PDF and co-founded Adobe Systems, dies at age 82

AP2001

FILE - Adobe co-founder John Warnock smiles in the lobby at Adobe headquarters in San Jose, Calif., on May 9, 2001. Warnock, the inventor of the PDF and Adobe Systems co-founder died Saturday, Aug. 19, 2023, the software company said. (AP Photo/Paul Sakuma, File)