Complexity Theory Retrospective ILO dans la presse internationale spécialisée van Oystaeyen dans la presse internationale spécialisée geometric models are defined that represent both the complete array of geometric variations possible during manufacture and also the influence of geometry on the function of individual parts and on assemblies of them All but one of the remainder of the chapters in this volume originated as a presentation at one of the recent meetings of the Structure in Complexity Theory Conference and appeared in preliminary form in the conference proceedings In Honor of Juris Hartmanis on the Occasion of His Sixtieth Birthday