Steve Jobs - Apple's visionary leader died of respiratory arrest caused by pancreatic cancer, according to his death certificate.
Jobs died on October 5 at the age of 56 at his home in Palo Alto. No post-mortem examination was performed, and Jobs was buried on Friday.
The death certificate, which listed his occupation as 'high-tech entrepreneur,' said that Jobs had a "metastatic pancreas neuroendocrine tumour" for the past five years, the BBC reports.
In 2004, Jobs revealed that he was suffering from pancreatic cancer. Five years later he had a liver transplant.
In January 2011 he took medical leave, before formally resigning as CEO in August and handing over his position to Tim Cook.
A statement from Jobs' family said they were with him when he died peacefully at his home in Palo Alto.