Oh, great to see that Code Quarterly is coming along.
Hal Abelson: My math PhD was in algebraic topology, which had nothing to do with computers. Then I got interested, through thinking about topology, in the relations with distributed computing and that eventually formed a bridge into doing something in computing.
For those wanting to find out a little more about these connections, Herlihy & Rajsbaum, 2000, An Overview of Synchronous Message-Passing and Topology, is a really great place to start.
http://www.cs.brown.edu/people/mph/HerlihyR96/sv.pdf