Lecture notes for the Systems Engineering Seminar, given in Room D-219, Thornton Hall, University of Virginia, 28 November 1979. This presentation is not listed in Warfield's vita. Another one he didn't have time to write in and keep up to date. This seminar was just a few days before we left for India. It was a 17p manuscript, unpaged typed, mimeographed and handwritten lecture notes.