A slot is a position within a group, series or sequence. It can also be a position of employment in an organization or hierarchy. A slot can be physical, mental, or emotional. Physically, a slot is an area of the body where an object or person can fit. Mentally, a slot is an area of concentration or focus. Emotionally, a slot can be a place of security or safety.

The pay table of a slot machine displays the regular paying symbols, alongside how much they are worth when they form a winning combination. It can also show how many ways a player can win and include details on any bonus features that are included in the game. Depending on the game, this information may be displayed in different locations. For example, it may be printed directly on the machine’s glass, or it might be contained in a help menu.

Psychologists Robert Breen and Marc Zimmerman[60] found that players of video slots can reach a debilitating level of involvement in the activity, even when playing for free. These researchers have referred to this phenomenon as “slot addiction.” They believe that the problem is caused by the addictive rewards of the game, which can be difficult to resist.

An airport slot is a permit to operate an airliner at a given time, usually during periods of high traffic density or when runway capacity is constrained (as at Heathrow). These slots are used to manage aircraft flow and congestion and have resulted in significant savings in delay and fuel burn for airlines. They are also an important part of EUROCONTROL’s network management function.

A slot is a dynamic placeholder that either waits passively for content to be added (passive slots) or actively calls for it using a scenario action or renderer. The content in a slot is dictated by the scenario that either uses an Add Items to Slot action or a targeter to fill the slot with its content. Several slot properties are important for offer management, including the slot type and pass-through behavior. See the Using Slots chapter of the ATG Personalization Programming Guide for more information.