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__NOTOC__ The term system may refer to: *System, a set of entities, real or abstract, comprising a whole *Meta-system, something composed of multiple smaller systems ==In natural sciences== *Systems science, an interdisciplinary field that studies the nature of complex systems in nature, society, and science *Physical system, the portion of the physical universe chosen for analysis * *Thermodynamic system *Planetary system, e.g., the Solar System *Ecosystem, an entity comprising a large number of organisms and their environment *Biological system, a group of organs *System (stratigraphy), a unit of the geologic record of a rock column *Linguistic system, a conception of linguistics in the tradition of linguists such as Ferdinand de Saussure, J. R. Firth, Louis Hjelmslev, Michael Halliday, Ruqaiya Hasan, Jay Lemke 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「System (disambiguation)」の詳細全文を読む スポンサード リンク
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