PROBLEM TO BE SOLVED: To provide a design development method utilizing a computer, a computer utilizing method, and a system easily and inexpensively realizing a normal operating environment including file management and document generation, and a development environment of software development evaluation or the like.;SOLUTION: A host OS 13, a virtual machine monitor 15, and a guest OS 16 are loaded in a computer (PC) 31, and an application 14 executing normal operation, and an application 17 carrying out design development are displayed in independent displays 32 and 33 respectively. By this, the normal operation and development operation can be executed in parallel.;COPYRIGHT: (C)2007,JPO&INPIT
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