This is a list of Major Air Command (MAJCOM) Wings of the United States Air Force (USAF), a designation system in use from the summer of 1948 to the mid-1990s. From 1948 to 1991 MAJCOMs had the authority to form wings using manpower authorizations under their control. Each MAJCOM or other organization reporting directly to USAF was assigned a block of four digit numbers to use for units it organized. The system terminated in 1991 when USAF assumed control of all units except for provisional ones.