# Starting an Application of the Specified Type

## When to Use
You can call the **startAbilityByType** API to start a vertical domain panel based on a specific business category, such as navigation, finance, and email. The panel displays all the vertical applications available on the device, and users can choose to open one of them. The vertical domain panel provides secure and trusted applications available on the device, while reducing the access cost of the caller.

![](./figures/process-start-intent-panel.png)

## Available APIs

The [UIAbilityContext.startAbilityByType](../reference/apis-ability-kit/js-apis-inner-application-uiAbilityContext.md#uiabilitycontextstartabilitybytype11) and [UIExtensionContentSession.startAbilityByType](../reference/apis-ability-kit/js-apis-app-ability-uiExtensionContentSession.md#uiextensioncontentsessionstartabilitybytype11) APIs can be used to start a vertical domain panel based on the business category specified by the caller. The vertical applications available on the device are displayed on the panel.