Charles Kline McNeil (16 August 1903 – 7 April 1981) is the inventor of the point spread in sports gambling. McNeil earned a Master's Degree from the University of Chicago. He then taught math at the Riverdale Country School in New York and in Connecticut. His students included John F. Kennedy. He was also a securities analyst in Chicago. While gambling on the side, he developed the point spread, betting not on the probability of the final outcome, but on the expected difference in score. He eventually opened his own bookmaking operation in the 1940s. Charles McNeil method is used today in different areas: anything from basketball to poker. He started the new method of trading and changed the way people bet.