PAUL E. GREEN Jr. has been a leader in various branches of radiophysics and communications, contributing planetary range-doppler mapping, the first operational spread spectrum system, and the first commercial wavelength division multiplex product, among other advances. He is a retired director of optical networking at Tellabs, as well as a former senior manager in the Computer Science Department at IBM Research Division. Dr. Green is also the author of the critically acclaimed book Fiber Optic Networks.