Steve Jobs, the co- founder of Apple and one of the most well-known innovators, visionaries and geniuses in the world, died on Oct. 5, shocking the whole world.

Jobs had been suffering from a pancreatic cancer. His gaunt appearance had always drawn close attention and made people question his health.

On Wednesday, Apple, the most valuable company in the world, announced Jobs' death, saying, Apple has lost a visionary and creative genius, and the world has lost an amazing human being. Those of us who have been fortunate enough to know and work with Steve have lost a dear friend and an inspiring mentor. Steve leaves behind a company that only he could have built, and his spirit will forever be the foundation of Apple.

The death of tech wizard triggered grief and sorrow as condolence messages poured out in Twitter, Facebook and other social networking sites.

Start the slideshow to see the top 10 biggest achievements of Steve Jobs.

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