The objective of multi-use telescopes is to reduce the initial and operational costs of space telescopes to the point where a fair number of telescopes, a dozen or so, would be affordable. The basic approach is to develop a common telescope, control system, and power and communications subsystem that can be used with a wide variety of instrument payloads, i.e., imaging CCD cameras, photometers, spectrographs, etc. By having such a multi-use and multi-user telescope, a common practice for earth-based telescopes, development cost can be shared across many telescopes, and the telescopes can be produced in economical batches. Drummond, Mark and Hine, Butler and Genet, Russell and Genet, David and Talent, David and Boyd, Louis and Trueblood, Mark and Filippenko, Alexei V. (Editor) Ames Research Center ...