Died on Oct 5, 2011 at age 56 from pancreatic cancer first diagnosed in 2004. Interestingly, it was from 2004 to 2011, while Jobs had pancreatic cancer that Apple stock skyrocketed from $11 to its peak around $413 just several months ago.
Articles:
Apple co-founder Steve Jobs dead at 56
Steve Jobs, Apple ‘visionary’, dies aged 56
Steve Jobs, Apple founder, dies
10 ways Steve Jobs changed the world
The spiritual side of Steve Jobs
Bios:
Apple
Wikipedia
All About Steve Jobs
Forbes
Wired
Speech:
Stanford Commencement Address
Stanford Commencement Address text