The slot is a position within a group, series, or sequence. In football, a player in the slot is often a bigger, shifty wide receiver who can get by defenders or make them miss.

In a slot machine, the player inserts cash or, in “ticket-in, ticket-out” machines, a paper ticket with a barcode, which activates reels that display random symbols and award credits based on the paytable. Each symbol has a different probability of appearing, so the odds of winning vary from game to game.

A statistical slot is used to store any table of data, such as curve (2-Dimensional), surface (3-Dimensional), or several unrelated sets of values (as in a table of water level heights). A table slot can have multiple columns and may require monotonically increasing values, as is the case in the Elevation Volume table example. A table slot can be accessed by clicking on an icon near the bottom of the screen.

A mass balance summary slot is a user-defined hierarchy of series slot collections used to check (i.e. sum) mass balance across many objects. Like regular series slots, mass balance sum slots can be used in RPL expressions and in other places where series slots are used. Like scalar slots, mass balance summary slots are shown in their own Slot Dialog. They can be docked on other Slot Dialogs or the Slot Viewer, and the display format is configured in the Slot Dialog. See Slot Dialog Functionality and Slot Viewer Functionality for details.