1. A data-independent type computer system, comprising: at least one of a processing machine, a data machine, and a man-machine interface machine connected to a network, said processing machine having hardware to implement software functions dedicated to job processing, including first electronic statement sending/receiving means for receiving an electronic statement that includes a job process request from said network, sending an electronic statement that includes a job process result to said network, sending an electronic statement that includes a data access request to said network, and receiving an electronic statement that includes a data access result from said network; and job process executing means for executing a job process corresponding to the electronic statement sent and received by said first electronic statement sending/receiving means, said data machine having hardware to implement software functions dedicated to data processing, including second electronic statement sending/receiving means for receiving an electronic statement that includes the data access request from said network and sending a data access result to said network; data storing means for storing data; and data accessing means for accessing data corresponding to the electronic statements sent and received by said second electronic statement sending/receiving means to said data storing means, and said man-machine interface machine having hardware to implement software functions dedicated to processing of a man-machine interface, including third electronic statement sending/receiving means for sending an electronic statement that includes the job process request to said network and receiving an electronic statement that includes the job process result from said network; and man-machine interfacing means for executing a man-machine interfacing process corresponding to the electronic statements sent and received by said third electronic statements sending and receiving means.