"He deserved much more time, but his contributions to the world of technology and philanthropy will live on for generations to come. I will miss him tremendously."

Analysis

Dave Lee, BBC North America technology reporter, San Francisco

I've spent Monday at the 25th anniversary of technology magazine Wired, an event celebrating the history of not just the magazine, but technology itself.

Paul Allen, who will be deeply missed by those here, was one of the industry's giants. His name would have been on Wired's pages many, many times.

Mr Allen had beaten cancer before, and he had appeared confident that he could beat it again. Those close to him said he was active, on emails at least, until the very end - offering advice, strategy and insight to the many, many people who looked to him for support.

Mr Allen didn't always have a great relationship with his co-founder, Bill Gates. The pair had a well-publicised row over stock ownership. But they shared an awful lot in common, first as children learning programming, and then as adults donating billions to philanthropic efforts.