Barack Obama, US President: By building one of the planet's most successful companies from his garage, he exemplified the spirit of American ingenuity. By making computers personal and putting the internet in our pockets, he made the information revolution not only accessible, but intuitive and fun."
"The world has lost a visionary. And there may be no greater tribute to Steve's success than the fact that much of the world learned of his passing on a device he invented."
Bill Gates, Microsoft Chairman: "The world rarely sees someone who has had the profound impact Steve has had, the effects of which will be felt for many generations to come,"
Mark Zuckerberg, Facebook founder: "Steve, thank you for being a mentor and a friend. Thanks for showing that what you build can change the world. I will miss you."
Bob Igner, president and CEO of Disney: Steve Jobs was a great friend as well as a trusted advisor, he said. "His legacy will extend far beyond the products he created or the businesses he built. It will be the millions of people he inspired, the lives he changed, and the culture he defined."
Steve Wozniak, Apple co-founder: "People sometimes have goals in life. Steve Jobs exceeded every goal he set himself."
Rupert Murdoch, CEO of Newscorp: "Today we lost one of the most influential thinkers, creators and entrepreneurs of all time. Steve Jobs was simply the greatest CEO of his generation."
"While I am deeply saddened by his passing, I'm reminded of the stunning impact he had in revolutionizing the way people consume media and entertainment. My heart goes out to his family and to everyone who had the opportunity to work beside him in bringing his many visions to life."
Lord Sugar: "Gutted Steve Jobs died. We started our computer biz at same time and were competitors through the 80s.Great visionary. Sadly missed. RIP"
Stephen Fry: "Woke to the news of Steve Job's death. He changed the world. I knew him a little and admired him entirely. Love to Apple and his family."
Tony Blair, former Prime Minister: "Steve Jobs was an extraordinary and creative human being, an inspiration and an innovator who believed that by the power of ideas the world could be transformed. As much as anyone in any walk of life in the early 21st century he changed people's lives simply by imagination and determination. His memory will serve as a symbol of what the human mind can achieve."
Eric Schmidt, Google's executive chairman: "Steve Jobs is the most successful CEO in the U.S. of the last 25 years. He uniquely combined an artist's touch and an engineer's vision to build an extraordinary company. One of the greatest American leaders in history."
Steven Spielberg, director: "Steve Jobs was the greatest inventor since Thomas Edison. He put the world at our fingertips."
Larry Page, CEO of Google: "He was a great man with incredible achievements and amazing brilliance. He always seemed to be able to say in very few words what you actually should have been thinking before you thought it. His focus on the user experience above all else has always been an inspiration to me."
Steve Case, founder of AOL: "I feel honoured to have known Steve Jobs. He was the most innovative entrepreneur of our generation. His legacy will live on for the ages."
Paul Allan, co-founder of Microsoft: "We've lost a unique tech pioneer and auteur who knew how to make amazingly great products. Steve fought a long battle against tough odds in a very brave way. He kept doing amazing things in the face of all that adversity. As someone who has had his own medical challenges, I couldn't help but be encouraged by how he persevered."
Also read our blog post on the career of Steve Jobs: