I've had the honor of using the McDonald telescopes, both as an observer and a programmer since 1974. During the 70s, I wrote the software and did much of the observing for the lunar occultation experiment. This science was done on the 30 inch telescope. I also did high speed photometry on the 36 inch telescope, ultraviolet spectroscopy using the 107 inch telescope and a couple of observing runs on the 82 inch telescope measuring radial velocities. Recently, I did the supernova search using the 30 inch and measured cepheid radial velocities using the 82 inch.