Steve Jobs, co-founder of Apple has died in California at the age of 56.
Jobs stepped down in August as chief executive of the company he helped set up in 1976, citing illness. He had been battling an unusual form of pancreatic cancer, and had received a liver transplant in 2009.
In a statement, Apple said Jobs's "brilliance, passion and energy were the source of countless innovations that enrich and improve all of our lives. The world is immeasurably better because of Steve."
By introducing the colourful iMac, iPod and iPhone, he has helped Apple to be the world's most valuable technology company, estimated at £227bn. Only oil giant Exxon Mobil worth more.
Flags have been flown at half mast outside the Apple headquarters in Cupertino, California.