A cluster system is extending its ability owing to the increase of transmission speed and interface speed between nodes and interconnect. Synfinity interconnect can carry out the routing and transfer the massages by the speed of Giga byte/s. Bottle neck problem raised in conventional cluster must be solved by such improvement as transmission speed and protocol. Based on standard interface, any kind of commodities like latest PCs,WSs and SMPs can be applied as a node computer. That makes cluster attractive system on the point of availability, usability, flexibility, scalability and cost performance. Moreover parallel program on cluster system can be written by using newly-developed message communication library without paying any attention to the communication between inter- and intra-node. Cluster system will be also used in stead of parallel computer, MPP and so called supercomputer and it have a new features of shared memory view.