Apple said his "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".

Jobs announced he was suffering from pancreatic cancer in 2004.
US President Barack Obama said that with his death, the world had "lost a visionary".

"Steve was among the greatest of American innovators - brave enough to think differently, bold enough to believe he could change the world, and talented enough to do it," said Mr Obama.

Microsoft boss Bill Gates said Jobs' "profound impact" on the world of technology would "be felt for many generations to come". He added: "For those of us lucky enough to get to work with him, it's been an insanely great honour. I will miss Steve immensely."

New York Mayor Michael Bloomberg said that "America lost a genius who will be remembered with Edison and Einstein, and whose ideas will shape the world for generations to come".

His death came just a day after Apple unveiled its latest iPhone 4S model.
In 2004, Jobs announced that he was suffering from pancreatic cancer and he had a liver transplant five years later.

In January, he took medical leave, before resigning as CEO in August and handing over his duties to Tim Cook. However, Jobs stayed on as Apple's chairman.

Despite a high profile, however, he remained fiercely protective of his private life. He married his wife Laurene in 1991, and the couple had three children.