Some Other stuff I've done
I moved this here because my home page has been getting too long. Here's some other interesting stuff that I've done:
Courses I've taught in recent years
the First Virtual Green Commerce Model and its implementation, the world's first operational Internet payment system;
The ATOMICMAIL language for safe and portable interactive electronic mail messages;
Various parts of the Andrew System from Carnegie Mellon;
In 1998-99, I served as the Robert Noyce Professor at Grinnell College.
Finally, people occasionally quote me on a couple of pithy sayings that have been floating around the Internet.