We've kept this blog going long enough that we start repeating our celebrations. Ten years ago Bill celebrated Don Knuth's 70th Birthday and today Donald Knuth turns 80. While he celebrates in PiteĆ„, Sweden with its less than 4.5 hours of daylight, we wish him a happy birthday from stateside. Looking back in this blog, in 2015 I wrote about the history of the history of computing includ