Paul Allen, known both as the co-founder of Microsoft and for his multitude of philanthropic pursuits, has been diagnosed with non-Hodgkin Lymphoma, a form of cancer.

We don't know much about his prognosis, though a letter from his sister says he's "feeling OK." Allen came down with Hodgkin's Lymphoma back in 1983 and beat it, and we're all hoping he can do it again