Flags outside Apple's headquarters at 1 Infinite Loop in Cupertino, California, flew at half mast as mourners gathered on a nearby lawn. Distraught Apple fans left flowers and a man played the bagpipes.
"In my mind there is no difference between him and a Pasteur," said Chitra Abdolzadeh, a healthcare worker in Cupertino, in reference to French chemist Louis Pasteur.
Ben Chess, 29, an engineer at an Internet company and a former Apple intern, drove to the Apple HQ from San Francisco after work to lay a bunch of flowers. "It's the right thing to do," he said.
Jobs, who died on Wednesday aged 56, overturned the way users browse the Internet by giving them the iPod, iPhone and iPad. He had stepped down as chief executive of the world's largest technology company in August.
Computer fans in China seemed particularly moved.
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