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Categories of physics with respect to theory:
Categories of physics with respect to building blocks:
The experiment is central to physics, and thus we may emphasize:
Alternatively, the categories could be similar to the divisions of the American Physical Society (APS). This approach would emphasize the topics that occupy physicists today. APS has the following divisions:
Categories of physics from a "social science" point of view:
Uncategorized
See also: Astronomy and Astrophysics.