The proceedings of the third TRON symposium presented here cover all aspects of the TRON project which aims at establishing the new computer architecture for the 1990s. The papers review the current status of development of TRON and its various subprojects as well as examine future trends. ITRON, BTRON, CTRON, MTRON, and TRON VLSI CPU chips are described. This volume gives an analysis, both generally and in-depth, of computer systems of the next decade.