From a Washington Post obit by Michael S. Rosenwald headlined “John Warnock, Adobe CEO who led desktop publishing revolution, dies at 82”:

John Warnock, who played a seminal role in the history of computing as co-founder and chief executive of Adobe Inc., helping create the Portable Document Format (PDF) and software that turned computers into digital printing presses, radically reshaping office life and publishing, died August 19.

Mr. Warnock and Charles Geschke founded Adobe in 1982, naming it after a creek near their homes in Los Altos, Calif. PostScript, the company’s first piece of software, let computer users print documents just as they appeared on-screen, with graphics and multiple fonts — a task that previously required a trip to a local printing press.