Future Technological Challenges for High Performance Computers

A high performance computer (HPC), sometimes called a supercomputer, is a highspeed, large-scale computer system designed for scientific and technical computations in application areas such as meteorology, molecular and bio-science, energy development, space science and so forth. These applications are called "Grand Challenge Problems" in which the major target is to run application programs within limited time periods. In this talk, architectural and system\´s key points as well as basic hardware technologies to realize high performance computer systems for grand challenge problems will be presented.