Achievements: Co-founder and president of Adobe from 1982, Geschke has been referred to as the Gutenberg of desktop publishing. After working for Xerox's Palo Alto Research Center, Geschke and colleague John Warnock left to start their own services company. Instead, they produced the PostScript programming language -- now the standard language for printing and imaging. Adobe went on to release key software developments, like Photoshop and Illustrator, and revolutionized the imaging world.
Today: Geschke retired in 2000, but remains co-chair of Adobe, alongside Warnock -- as the company they built together remains a leader in collaborative software and publishing technology. Last summer Geschke was inaugurated as holder of the Rossi Entrepreneurial Chair at the University of San Francisco, and was given an honorary doctorate in May as he gave the commencement speech for John Carroll University.