Charles Geschke, American businessman, co-founded Adobe Systems (died 2021)

Charles Matthew "Chuck" Geschke was an American businessman and computer scientist best known for founding the graphics and publishing software company Adobe Inc. with John Warnock in 1982, with whom he also co-created the PDF document format.

Adobe Inc., formerly Adobe Systems Incorporated, is an American multinational computer software company based in San Jose, California. It offers a wide range of programs from web design tools, photo manipulation and vector creation, through to video/audio editing, mobile app development, print layout and animation software.

September 11 is the 254th day of the year in the Gregorian calendar; 111 days remain until the end of the year.