I had an interesting experience today after my “Introduction to Microprocessors and Digital Circuits” class (EGR 204) ended. Professor Ploegstra, who teaches biology in the next hour walked in to prepare the room for his class. After taking a look at my whiteboard markings he remarked something like, “ABCD, ABCD, blah, blah, blah, bhah.” I had a whole bunch of Boolean algebra (more than above) on the whiteboard with lots of repetitions of the letters ABCD along with expressions like (A + B + C + D), which is what provoked his remark. I responded that you can make a lot out of just four letters of the alphabet. Genetic codes are often given using four letters such as ACGT or ACGU. We had a good laugh!
