Excellent system capability occupies a little limited resources of system actually when the computer is dealing with general tasks, and the requirements of hardware of PC-M are not higher than that of general configuration, but it can achieve system resources dynamic allocation. It greatly reduces the system investment risks: working application needs to upgrade once every two to three years ,and each upgrading will replace about 80% hardware devices since the computer CPU upgrades too fast, but this system only needs 20% hardware devices in replacement .    It greatly reduces maintenance, you only maintain a little host at present , a big reduction on system maintenance .    It greatly minimizes the cost for the purchasing hardware items and saves 25%-52% costs than that of recent general scheme .    It greatly minimizes the cost of purchasing software, only needs to install a set of software system in the host to serve multiple users at the same time .