A tote board is a large numeric or alphanumeric display used to convey information, typically at a race track to display the odds or payoffs for each horse.
The term "tote board" comes from the colloquialism for totalizator (or totalisator), the name for the automated system which runs pari-mutual calculating payoff odds, displaying them, and producing tickets based on incoming bets.
The first totalisator was invented by William Brownie Garden. The machine was installed at Ellerslie Racecourse in New Zealand in 1925, and the second was installed at Gloucester Park Racetrack in Western Ausrailia in 1930. Julius founded Automatic Totalisators Limited (ATL) in 1917, which supplied the 'Premier Totalisator; now including electrical components.
The first totalisators installed in the United States were at Hialeah Park, Florida in 1932 (by ATL), and at Arlington Park racecourse, Chicago, in 1933.