Pioneering tribes, notably the Seminole Tribe of Florida, showcased Class II slot machines during the 1990s as the technology improved to make them appear more slot-like. Originally introduced as an “electronic enhancement” of traditional bingo under IGRA’s Class II rules, electronic bingo machines would evolve through an effort by suppliers to multiply potential bingo-card patterns and work the math, displaying bingo results as the reel results in games that looked identical to the slot machines in commercial casinos. The history of Class II electronic bingo under the Indian Gaming Regulatory Act of 1988 is one of conflict.
