Sad news today.  What an impact Steve had on the world during his time here.

Steve Jobs, the visionary in the black turtleneck who co-founded Apple in a Silicon Valley garage, built it into the world's leading tech company and led a mobile-computing revolution with wildly popular devices such as the iPhone, died Wednesday. He was 56.

The hard-driving executive pioneered the concept of the personal computer and of navigating them by clicking onscreen images with a mouse. In more recent years, he introduced the iPod portable music player, the iPhone and the iPad tablet -- all of which changed how we consume content in the digital age.

His friends and Apple fans on Wednesday night mourned the passing of a tech titan.

"Steve's brilliance, passion and energy were the source of countless innovations that enrich and improve all of our lives," Apple said in a statement. "The world is immeasurably better because of Steve."

More than one pundit, praising Jobs' ability to transform entire industries with his inventions, called him a modern-day Leonardo Da Vinci.

"Steve Jobs is one of the great innovators in the history of modern capitalism," New York Times columnist Joe Nocera said in August. "His intuition has been phenomenal over the years."

View a time line of Steve Jobs' work

Jobs' death, while dreaded by Apple's legions of fans, was not unexpected. He had battled cancer for years, took a medical leave from Apple in January and stepped down as chief executive in August because he could "no longer meet (his) duties and expectations."

Born February 24, 1955, and then adopted, Jobs grew up in Cupertino, California -- which would become home to Apple's headquarters -- and showed an early interest in electronics. As a teenager, he phoned William Hewlett, president of Hewlett-Packard, to request parts for a school project. He got them, along with an offer of a summer job at HP.

via Steve Jobs, Apple founder, dies - CNN.com.