> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# License-Related Objects

> License-Related Objects in the ABBYY FineReader Engine API — This section contains descriptions of the following license-related objects:

This section contains descriptions of the following license-related objects:

* [License](/fine-reader/engine/api-reference/license-related-objects/license)
* [Licenses](/fine-reader/engine/api-reference/license-related-objects/licenses)
* [ILicensingConnectionRecoveryCallback](/fine-reader/engine/api-reference/license-related-objects/ilicensingconnectionrecoverycallback) (Linux and Windows)

## The license-related objects hierarchy

### Linux and Windows

<img src="https://mintcdn.com/abbyy/lsETHFYUFiongXSm/images/fine-reader/engine/licenserelatedobjects.gif?s=398b3ed045f93144ed8a6dd31e209c81" alt="LicenseRelatedObjects" width="215" height="93" data-path="images/fine-reader/engine/licenserelatedobjects.gif" />[](/fine-reader/engine/api-reference/license-related-objects/ilicensingconnectionrecoverycallback)[](/fine-reader/engine/api-reference/license-related-objects/license)[](/fine-reader/engine/api-reference/license-related-objects/licenses)[](/fine-reader/engine/api-reference/license-related-objects/license)

For more information about the hierarchy of the ABBYY FineReader Engine objects, please see the [Object Diagram](/fine-reader/engine/api-reference/object-diagram).