Hohokam (ho-ho-KAHM) is the name applie to one of the four major prehistoric archaeological traditions of the American Southwest. Variant spellings in current, official usage include Hobokam, Huhugam and Huhukam. The culture was differentiated from others in the region in the 1930s by archaeologist Harold S. Gladwin, who applied the existing O'odham term, to classify the remains he was excavating in the Lower Gila Valley. According to the U.S. National Park Service Website, Hohokam is a Pima (O'odham) word used by archaeologists to identify a group of people that lived in the Sonoran Desert of North America.