This tribute volume honors two icons in the world of applied optics: Robert (Bob) Shannon and Roland Shack. Based on an August 2004 tribute conference held at the SPIE Optical Science and Technology meeting, the volume contains both technical and non-technical papers by the honorees' colleagues and former students at the University of Arizona's Optical Sciences Center (OSC). The papers divulge the origin and development of such technologies as the Multiple Mirror Telescope (MMT) and the Shack-Hartmann Wavefront Sensor, as well as shed light on the formative years of the OSC. In addition to the original material, the volume contains a substantial collection of previously published journal papers authored by Bob Shannon, Roland Shack, or their former students.