A slot is a narrow opening, typically with an edge or lip, into which something can be inserted. For example, a mail slot is used to receive letters and postcards. Also, a slot is a place or position in a game, sequence or series.

In slot games, pay tables (also called information or rules tables) display the possible combinations of symbols and their payouts. They can be found on the face of a physical machine, above and below the area containing the reels, or in the help menu on video machines. They can contain a variety of elements, including the game rules, the RTP rate, betting requirements, jackpots and bonus features.

There are many different types of slot machines, from single-payline classic slots to modern online video slots with hundreds of ways to win. Each type has its own unique gameplay, symbols and payouts.

In general, each slot in a time series contains one value per timestep and is displayed on a scroll bar. Each slot value may show a full date and time, a status flag, and a value that is either solved for or set as the result of a rule in rule-based simulation. A value that shows NaN (Not a Number) indicates an unsolved variable. In Iterative MRM mode, a slot value can be viewed and edited using the Slot Dialog. In addition, the first row of a slot can be docked to a Slot Viewer by dragging it, as described in the Slot Viewer section below.