Typical 4-story SAGE Direction Center. 1st floor: Air cooling and ducting equipment plus telephone frames, cables, and equipment to maintain communication and radar data flow. Power house attaches to operations part of building by a common wall. 2nd floor: The SAGE FSQ-7 duplex computers. 3rd floor: Service area for the operation room above plus office and storage space, the subsector command post, and the Kelvin-Hughes projector and air-situation display screen. 4th floor: Operational areas where Air Force staff supervised each major air defense function (weapons direction, identification, air surveillance, etc.) from separate areas.