A totalizer is a device or system used to count and display cumulative totals of events or quantities. Commonly found in various applications, such as lottery systems and sports scoring, totalizers help track the overall results in real-time. They can be mechanical or digital, providing users with an easy way to monitor progress or outcomes. In the context of horse racing, a totalizer is specifically designed to calculate and display the total amount of money wagered on each horse. This information is crucial for bettors, as it helps them understand the odds and potential payouts. Totalizers enhance the transparency and excitement of betting activities.