A narrow opening, hole or groove into which something fits. The term can also be used to refer to a position in a sequence or series of events, such as an open time slot on the calendar. He slotted in the appointment at 2 pm.

In computer hardware a slot is an area of the motherboard into which expansion cards can be plugged in. It is also the name of a specific type of slot machine, originally invented by Charles Fey in 1895, which uses a reel to display symbols and pay out credits based on the combination.

Many slots have a theme that appeals to players. Some use popular film and television titles, while others follow a particular genre or location. Many of these games offer multiple bonus features that align with the theme. Some even have progressive jackpots that increase with each spin.

Most slot machines require the player to insert cash or, in “ticket-in, ticket-out” machines, a paper ticket with a barcode. Then, a lever or button (either physical or on a touchscreen) activates the reels and stops them to rearrange the symbols. If a matching combination appears, the machine pays out the amount indicated on the paytable.

A slot can be a fun way to pass the time, but it can also lead to gambling addiction. The CDC recommends seeking help for gambling problems before they become a serious issue. Fortunately, there are many ways to manage your gambling habits and reduce the risk of developing a problem.