Oklahoma has the largest Native American population of any state in the U.S. Many of the 250,000 American Indians living in Oklahoma are descended from the 67 tribes who inhabited the Indian Territory. Oklahoma is tribal headquarters for 38 tribes.
The world's first installed parking meter was in Oklahoma City, on July 16, 1935. Carl C. Magee, of Oklahoma City, Oklahoma, is generally credited with originating the parking meter. He filed for a patent for a "coin controlled parking meter" on May 13, 1935.
The National Cowboy Hall of Fame is located in Oklahoma City.
An Oklahoman, Sylvan Goldman, invented the first shopping cart.