関連ワード:  what is open and closed system    what is open and closed system in mis    what is open and closed system in system analysis and design    what is open and closed system in thermodynamics    what is open and closed system in management    what is open and closed system in chemistry    what is open and closed system in software engineering    what is open and closed system of circulation    what is open and closed system in physics    what is open and closed system in computer