This volume contains the proceedings of an internationalworkshop on parallelism in inference systems held in Germanyin December 1990. The topicof the workshop is still ratheryoung and several papers in the book are overview articlesintended to provide a first orientation toward some of themore intensively investigated subtopics.The main part of the book is a compilation of researchpapers on parallelization in special domains ofinferencesuch as rewriting, automatic reasoning, logic programming,andconnectionist inference. Appended to the book is acollection of short project summaries received in responseto a worldwide email call.The book is intended primarily for researchers working oninference systems who are interested in parallelizing theirsystems.