Stephen Wolfram (the founder of Wolfram Alpha) has published some interesting data that gives a revealing portrait of his own life.
Amongst other things he has recorded the time of every one of the 300,000 e-mails that he has sent in the last 20 years:
Not only can you get a clear view of his work day but also the increase in the use of e-mail in that time. This is revealed in more detail here with clear peaks as the big projects he has worked on have come to fruition:
Not only has he looked at e-mail but he has also recorded other information about himself such as the number of paces he takes each day, and even the number of key strokes on his keyboard. Putting this together:
