Iconic tech-company founders often come in pairs: Bill Hewlett and David Packard. The world lost half of one such duo Monday when Paul Allen, who cofounded Microsoft with his childhood friend Bill Gates, died from non-Hodgkin's lymphoma. For the last three decades of his life, Allen was best known as a philanthropist and prolific entrepreneur. He funded the first successful privately financed spacecraft launch and the development of the world's largest aircraft. And he owned two professional sports teams, football's Seattle Seahawks and basketball's Portland Trail Blazers, and co-owned another, soccer's Seattle Sounders.