Logic programming refers to execution of programs written inHorn logic. Among the advantages of this style ofprogramming are its simple declarativeand proceduralsemantics, high expressive power and inherentnondeterminism.The papers included in this volume were presented at theWorkshop on Parallel Logic Programming held in Paris on June24, 1991, as part of the 8th International Conference onLogic Programming. The papers represent the state of the artin parallel logic programming, and report the currentresearch in this area, including many new results.The three essential issues in parallel execution of logicprograms which the papers address are:- Which form(s) of parallelism (or-parallelism,and-parallelism, stream parallelism, data-parallelism, etc.)will be exploited?- Will parallelism be explicitly programmed by programmers,or will it be exploited implicitly without their help?- Which target parallel architecture will the logicprogram(s) run on?

Logic programming refers to execution of programs written inHorn logic. Among the advantages of this style ofprogramming are its simple declarativeand proceduralsemantics, high expressive power and inherentnondeterminism.The papers included in this volume were presented at theWorkshop on Parallel Logic Programming held in Paris on June24, 1991, as part of the 8th International Conference onLogic Programming. The papers represent the state of the artin parallel logic programming, and report the currentresearch in this area, including many new results.The three essential issues in parallel execution of logicprograms which the papers address are:- Which form(s) of parallelism (or-parallelism,and-parallelism, stream parallelism, data-parallelism, etc.)will be exploited?- Will parallelism be explicitly programmed by programmers,or will it be exploited implicitly without their help?- Which target parallel architecture will the logicprogram(s) run on?