The United States Army Special Operations Command (USASOC) is the unified command structure in which individual Army Special Operations units such as Rangers, Special Forces, 160th Special Operations Aviation, Civil Affairs, Psychological Operations, and various support elements are housed under. The JFK Special Warfare Center and School is also part of USASOC, and contains various Special Forces schools and courses such as the Special Forces Qualification Course.
Note that Special Mission Units such as Delta Force are not a part of USASOC but rather falls in under JSOC.