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l High-Energy Astrophysics I. INTRODUCTION In preparing this report for the Astronomy Survey Com- mittee, the Panel on High Energy Astrophysics solicited the knowledge and opinions of scientists working in each of the subdisciplines and representatives of the funding agencies. Meetings of the panel were held in Chicago, Pasadena, and Cambridge and were devoted to presentations and discussions of scientific opportunities and require- ments and of resources that may be available during the coming decade. An essential foundation for all the dis- cussions and for the conclusions we present herein is the effort devoted to formulation of goals and strategies in high energy astrophysics by many individuals who have served on committees of the National Research Council (NRC) and the funding agencies. We have used material in the reports of those committees and planning documents furnished to us by the National Aeronautics and Space Administration, the National Science Foundation, the Department of Energy, and the Department of Defense. In particular we have had frequent reference to the report, A Strategy for Space Astronomy and Astrophysics for the 1980's, by the Committee on Space Astronomy and Astro- physics of the NRC Space Science Board, and the report, A Program in High-Energy Astrophysics, by the High-Energy Astrophysics Management Operations Working Group of the National Aeronautics and Space Administration. In addi- tion, we have received special reports and statements 1