At a Starbucks years ago, a woman next to me requested to plug into my USB charger, which had an open port. Since any interaction of mine with a new person was doomed to awkwardness, of course I ended up with the sadly comical three-try, two-rotation final insertion. She made a crack about Schroedinger's USB port and I smiled, then she began to explain to me that it was a physics thing. After I replied that, yeah, that was my undergrad. It turned out to be hers as well. Then we found out that we had both gone into programming. She was doing programming in medicine, and, when prompted for further details, mentioned working on the software for one of those multi-beam radiation gizmos.<p>I mentioned Therac-25 and we were off to the races. I think we talked for about two hours on programming in high-risk situations, hers in those machines, mine in location services and routing for emergency services. That maniacal technician who irradiated that poor boy (the names escape me) was brought up. At one point we hit on the Challenger disaster. I was comforted to meet another programmer who had certain philosophies about making reliable niche software. I'm not at that level, but I think it is something to which I ought to occasionally aspire.