Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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computer science the science and study of computers, including how they are made and how they work.
earth science Earth science is the study of the planet Earth. Earth science is especially interested in what the planet is composed of, its weather, and how the planet developed and continues to change over time. Many different sciences, such as geology and meteorology--the study of weather--are part of earth science.