United States Special Operations Forces (SOF) are components of the Department of Defense's United States Special Operations Command (USSOCOM).
The U.S. military definition of Special Operations Forces according to the Department of Defense Dictionary of Military and Associated Terms is "Those Active and Reserve Component forces of the Military Services designated by the Secretary of Defense and specifically organized, trained, and equipped to conduct and support special operations. Also called SOF". The definition in the DOD Dictionary of Military and Associated Terms references Joint Publication 3-05.1 - Joint Special Operations Task Force Operations (JP 3-05.1) as its source.
Joint Special Operations Command (JSOC) ★★★
* Note: ALO/TACP are not inherently designated SOF, only ALO/TACP belonging to Special Tactics Squadrons which are under AFSOC, the vast majority of TACPs/ALOs are in Air Support Operations Squadrons which belong to Air Combat Command.