John Killing beck has wrinen some eighty scientific publications, including five books. His publications range over the fields of group theory, perturbation theory and microcomputer numerical algorithms. He has been a visiting professor at the Universities of Guelph ( 197 4) and Besancon ( 1991). He was a Reader in Theoretical Physics at the University of Hull, where his plan to redeploy to computer science was halted by his enforced early retirement in 1989. He currently works part-time in the School of Mathematics at Hull, and intends to extend his freelance lecturing and writing activities.