What is "origamiusa"

OrigamiUSA (sometimes abbreviated as "OUSA") is the largest origami organization in the United States, with offices located at the American Museum of Natural History in New York City. It was founded in 1980 by Michael Shall, Alice Gray, and Lillian Oppenheimer as the Friends of the Origami Center of America. Since its founding, OrigamiUSA has been fully non-profit and volunteer-based and is a 501(c)(3) corporation. OrigamiUSA organizes the largest origami convention in the world each June in New York City, and in addition publishes a magazine, The Paper, an annual collection of origami diagrams, and a website, and also provides educational materials and supports numerous other activities that spread the art of origami.