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The Harris County Medical Society  (HCMS) is the largest county medical society in the United States, with a membership of more than 11,000 physicians and medical students.  Established in 1903, it is the professional organization for physicians in Harris County. The Executive Board is the governing board of the HCMS. 
      
The Houston Academy of Medicine (HAM) was incorporated by the HCMS in February 1915 to establish a medical library. HAM is the scientific and charitable [501 (c) (3)] organization of the physicians who make up the membership of HCMS.  In addition to providing community health education, HAM owns and operates the Jesse H. Jones Library Building, and is one of the participating institutions in the operation of the Houston Academy of Medicine-Texas Medical Center Library. The HCMS Executive Board also serves at the Board of Trustees, the governing body of HAM.  The four HCMS members-at-large serve as the officers of HAM, with the senior member-at-large serving as president.