Charles "Chuck" Geschke, who co-founded Adobe in 1982 with John Warnock and helped develop PDF technology, died on Friday at 81 (Fiona Kelliher/Mercury News)

Fiona Kelliher / Mercury News:

Charles “Chuck” Geschke, who co-founded Adobe in 1982 with John Warnock and helped develop PDF technology, died on Friday at 81  —  Survived kidnapping at gunpoint  —  Charles “Chuck” Geschke, co-founder of the iconic Silicon Valley company Adobe Inc. and prominent cheerleader of downtown San Jose, died Friday at age 81.

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