This report summarizes the results of work done during FY 1984 by the staff of the Energy Division of Oak Ridge National Laboratory in collaboration with colleagues from other divisions and subcontractors. The work of the Division is very diversified, but it can be divided into four major categories: (a) analysis and assessment of energy and environmental issues, (b) data systems research and development, (c) technology development for more efficient energy use, and (d) electric power systems technology development. Separate abstracts have been prepared for each category.