Off-track betting (or OTB; in British English, off-course betting) is sanctioned gambling on greyhound racing or horse racing outside a race track. == U.S. history == Before the 1970s, only the state of Nevada allowed off-track betting.
Off-track betting (or OTB; in British English, off-course betting) is sanctioned gambling on greyhound racing or horse racing outside a race track. == U.S. history == Before the 1970s, only the state of Nevada allowed off-track betting.
Source: Wikipedia "Off-track betting" · CC BY-SA 4.0
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