The term “Slot” can mean a number of things. In simple terms, it refers to a permission given to a particular aircraft to land and take off at a certain airport. While slots aren’t exactly a game, they have become a powerful tool for managing air traffic in crowded airports. The concept of slots was first introduced in the late 1970s in Europe, where they have successfully reduced delays and fuel consumption.
A slot can be any amount, duration, or number. This is especially useful when mapping a single value to another. The built-in types are useful for mapping values such as the number of rooms needed, number of nights, and date. Custom slot types are also useful in some cases. For example, a location slot can be used to mark a specific location in an utterance. You can even define a custom type of slot and map it to an entity.
Slot was originally a Middle English word, meaning “hollow at the base of the throat above the breastbone”. It is from the Old French esclot, but its origin is unclear. Old Norse slod also refers to the same thing. By the late 14c., it had acquired its present meaning. It was used in the 1880s to describe slot machines. The term “slot machine” dates from 1888.