This report, profusely illustrated with color photographs and other graphics, elaborates on the Department of Energy (DOE) research program in High Performance Computing and Communications (HPCC). The DOE is one of seven agency programs within the Federal Research and Development Program working on HPCC. The DOE HPCC program emphasizes research in four areas: (1) HPCC Systems--evaluate advanced architectures for large-scale scientific and engineering applications; (2) Advanced Software Technology and Algorithms--research computational methods, algorithms, and tools; develop large-scale data handling techniques; establish HPCC research centers; and exploit extensive teaming among scientists and engineers, applied mathematicians, and computer scientists; (3) National Research and Education Network--research and develop high-speed computer networking technologies through a multiagency cooperative effort; and (4) Basic Research and Human Resources--encourage research partnerships between national laboratories, industry, and universities; support computational mathematics and computer science research; establish research and educational programs in computational science; and enhance K through 12 education. The stated goals of the DOE HPCC program are to support the economic competitiveness and productivity of the United States, accelerate the application of HPCC technology to the solution of scientific and engineering problems, and enhance U.S leadership in research, development, and deployment of HPCC technologies. A number of examples of DOE HPCC operations are provided, including the MatVu matrix visualization computer software package; Global Ocean Model; Molecular Dynamics Simulations; Pion Propagator; Three-Dimensional Tokamak Modeling; MediaView, a system for multimedia communication; and the CASA testbed, a wide-area, very high speed communication network that enables a number of collaborating agencies to work with geographically dispersed supercomputing resources. (DB)