一、引言在日本的一百多所主要的国立、公立和私立大学、高等学院或技术工程学院之间,有一个四通八达的计算机网络将它们紧密地联结在一起,构成了一个庞大的计算机资源共享系统。这一系统以东京大学、北海道大学、东北大学、名古屋大学、京都大学、大阪大学和九州大学等七所大学的计算机中心为主要结点向其所在地区的其它大学或学院延伸面形成,其中又以东京大学的计算机中心所具规模最 I. INTRODUCTION Between Japan’s more than 100 major national, public and private universities, colleges of higher learning, or technical engineering institutes, there is a network of computers connected in all directions to tightly link them to form a huge computer resource sharing system. This system has been extended to other universities or colleges in its area by taking computer centers of seven universities such as Tokyo University, Hokkaido University, Northeastern University, Nagoya University, Kyoto University, Osaka University and Kyushu University as the main nodes, of which, The University of Tokyo computer center with the largest