Also, another new graduate student, John J. Uicker, arrived in the fall of 1961, who knew nothing of computers or of matrix algebra. However, during the next 4 years he overcame both of these shortcomings and he had general computer programs operating for displacement, velocity, acceleration, static force, and dynamic force analysis, as well as small amplitude vibration analysis of rigid-body systems. One might say that these were among the initial roots of numerical multibody dynamics. Also, during that 4-year span, Uicker met two more people who are important to the continuation of our story. First, Denavit learned of another young student by the name of Milton A. Chace who was pursuing very parallel research for his graduate degrees under Professor Joseph Shigley at the University of Michigan. Chace visited Northwestern for a few days, and he and Uicker became the best of personal friends and also the strongest of professional rivals, each determined to prove that his approach was superior, Chace with vector algebra and Uicker with matrix algebra. The other meeting of importance was with Professor Donald F. Livermore of the University of Wisconsin faculty, who came to the Northwestern University to complete his Ph.D. under Professor Denavit and Professors Hartenberg, and who extended the matrix method to include the search for static equilibrium on systems of the complexity of automobile suspensions. Uicker and Livermore shared an office and worked together in the programing of this equilibrium search software, becoming very close friends.