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Branches of science

The branches of science, also referred to as sciences, "scientific fields", or "scientific disciplines," are commonly divided into three major groups:

Natural and social sciences are empirical sciences, meaning that the knowledge must be based on observable phenomena and must be capable of being verified by other researchers working under the same conditions. This verifiability may well vary even within a scientific discipline

Natural, social, and formal science make up the fundamental sciences, which form the basis of interdisciplinary and applied sciences such as engineering and medicine. Specialized scientific disciplines that exist in multiple categories may include parts of other scientific disciplines but often possess their own terminologies and expertises.

 
Note:   The above text is excerpted from the Wikipedia article Branches of science, which has been released under the GNU Free Documentation License.
 

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