# Services and actions
Orbeon Forms comes with a few powerful options to perform complex operations on or with forms. These fall into two main categories:
* *Actions:* They run within a form while the user is working with the form.
* *Simple Processes:* They typically run in association with a form button, such as a "Submit" button.
The following diagram illustrates how Actions and Simple Processes relate to a form:
Actions and processes
For more details, see the following blog post: [Making sense of Form Runner Actions](https://www.orbeon.com/2024/09/making-sense-form-runner-actions).
See also:
* [Simple Actions](/form-builder/advanced/services-and-actions/actions.md)
* [Action Syntax](/form-builder/advanced/services-and-actions/actions-syntax.md)
* [Action Syntax Examples](/form-builder/advanced/services-and-actions/action-syntax-examples.md)
* [Database Services](/form-builder/advanced/services-and-actions/database-services.md)
* [HTTP Services](/form-builder/advanced/services-and-actions/http-services.md)
* [Synchronizing repeated content](/form-builder/advanced/services-and-actions/synchronize-repeated-content.md)
* [Simple processes](/form-runner/advanced/buttons-and-processes.md)
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