El Paso maintained a large presence in the building with its Southern Natural Gas division using it as its headquarters.
University of Southern California | Southern California | National Trust for Places of Historic Interest or Natural Beauty | American Museum of Natural History | Natural History Museum | Southern United States | Southern Methodist University | Southern Hemisphere | United States District Court for the Southern District of New York | natural history | Field Museum of Natural History | Southern Rhodesia | natural gas | Natural environment | National Museum of Natural History | Southern Railway | Southern Nations, Nationalities, and People's Region | Southern Pacific Transportation Company | Southern League | Southern Metropolitan Football League | Southern Football League | Natural history | Swedish Museum of Natural History | Southern Illinois University | Natural History | CS gas | Carnegie Museum of Natural History | Southern Christian Leadership Conference | Southern rock | Southern Province |