The American Institute of Physics, or AIP, identifies itself as a Federation of the Physical Sciences and, as such, identifies the following Member Societies as "the backbone of the Institute":
* The Acoustical Society of America
* American Association of Physicists in Medicine
* American Association of Physics Teachers
* American Astronomical Society
* American Crystallographic Association
* American Meteorological Society
* AVS: Science & Technology of Materials, Interfaces, and Processing