# How it works

Stadium applications consist of inter-related components that are arranged and connected in such a way that specific user objectives can be achieved.

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### Stadium applications

Stadium applications have three main areas of responsibility:

1. [*Pages*](/features/pages.md) contain [*controls*](/controls.md) that display data and that users interact with.
2. [*Connector*](/connectors.md)*s* connect to data sources to fetch, add or change data.
3. [*Event handlers*](https://github.com/stadium-software/docs/blob/main/features/\[_Scripts_]\(../features/scripts-and-event-handlers.md\)-and-event-handlers.md) and [*Scripts*](/features/scripts-and-event-handlers.md) (Javascript) are the glue between page controls and the [*Connector*](/connectors.md)s.
   * Event handlers and [*Scripts*](/features/scripts-and-event-handlers.md) use *actions* to:
     1. Assign data from [*Connector*](/connectors.md)s to controls
     2. Retrieve data from controls to pass on to [*Connector*](/connectors.md)s
     3. Dynamically change control properties and data
   * Event handlers are triggered by [*events*](/features/events.md). When events fire, they run their event handlers. Examples of events:
     * Load
     * Click
     * Change

Stadium applications are designed in [Stadium Designer](/how-it-works/designer.md) and hosted on [Stadium Application Manager](/how-it-works/application-manager.md).


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