Chemical Calculation on Japanese Supercomputers

Though some users previously had used computers with optional integrated array processor (IAP), serious supercomputing in Japan started only in late 1983, when the first Hitac S-810 was installed at the University of Tokyo Computer Center. A Facom VP-100 was introduced soon afterward to Nagoya and Kyoto Universities. The Computer Center of the Institute for Molecular Science (IMS), which provides several thousand hours of CPU time to the molecular science community, started the service of a Hitac S-810/10 supercomputer in January, 1986, together with a powerful scalar mainframe Hitac M-680H. The IMS supercomputer was upgraded to a brand new Hitac S-820/80 in February, 1988. The present equipment at the IMS Computer Center is shown in Figure 1.