The members of the organising Committee and their colleagues have, for many years been investigating the evol ution of the fas'cinating surface features which develop during sputtering erosion of solids. Such experimental, theoretical and computational studies have also been carried out in many international laboratories and, as well as much cow onality and agreement, substantial disagreements were unresolved. In view of the increasing importance of such processes in technological applications such as microlitho graphic etching for the patterning of solid state devices and in fusion...