In sports, the slot is a position on a team’s offense between the linemen and the wing wideout. A player in this position can run a lot of routes and should be good at receiving short passes. A good player in the slot can help a running back or tight-end get open for more yards.
In a casino, you insert cash or, in “ticket-in, ticket-out” machines, a paper ticket with a barcode into the designated slot on the machine to activate it. The machine then spins reels that display symbols and, if you line up enough of these symbols, pays out credits based on the paytable. Most slots have a theme, with symbols and bonus features aligned to that theme.
A slot is a vertical column of symbols on a video screen, usually five, but it can be three or more. In modern machines, these symbols are represented by computer chips that make a thousand calculations every second. The machine also has a Random Number Generator (RNG) that records the sequence of numbers each time it receives a signal, which can be anything from someone pressing a button to the handle being pulled.
The RNG produces a set of three numbers, and the computer uses an internal sequence table to match those numbers with each stop on a particular reel. That table is designed by the machine manufacturer, called a par sheet, and it makes the odds and house edge for each machine known to the casino.