Yesterday, while I was waiting for my computer to be reimaged due to some serious funk happening with my outlook mail, I had a couple hours to burn. After I killed a longer than normal walk at lunch, I sat down in the lobby with a good book. Background: my products are reliant on a lot of technology, but one aspect is critical in how they work and are used. This being a PID Servo Control system...
Refresher: Set theory and logic
R