A slot is a narrow opening, groove, or hole that can be inserted into something else, such as a door. It can also refer to a position in a sequence or program, for example, a time slot that is booked for an event. A slot is also an area that can be used for a specific purpose, like the high slot in hockey where a defenseman can take a blistering slap shot.

In a slot machine, the pay table shows the amount of money you can win if the symbols listed on the pay line appear in a winning combination. The symbols vary by machine, but most have pictures of fruit or numbers. Some slots have wild symbols that can replace other symbols to form a winning combination. The pay table is usually displayed on the screen above or below the reels.

The number of possible combinations for a slot machine is limited by the number of stops on each reel and the fact that each stop corresponds to a certain symbol. However, modern machines use electronics that allow the odds of winning to be adjusted by weighting particular symbols. This reduces the likelihood that a single symbol will appear on the payline and increases the size of jackpots.

Slots are also used in air traffic control to manage the flow of flights at busy airports and prevent the repeated delays that can occur when too many planes attempt to take off or land at the same time. This method of flow management has been successful in reducing delays and fuel burn and is expected to be introduced to other parts of the world.