Professor Walter Kelley received his BS degree from the Georgia Institute of Technology in 1968, and his doctorate from the University of Colorado in 1972. He then joined the OU Mathematics Faculty until his retirement in 2003. His research interests lie in Ordinary and Partial Differential Equations and Difference Equations, especially boundary value problems, singular perturbations, asymptotic behavior, and applications. In addition to numerous research publications, he has authored two books on Difference and Differential Equations. In 1998 he was the winner of the MAA Regional Outstanding Teacher Award and was named Associates' Distinguished Lecturer.