# Inventory moduleThe `Inventory` module is part of the new inventory infrastructure,which replaces the legacy `CatalogInventory` module with new and expanded features and APIs for Inventory Management. The [Inventory Management overview](https://devdocs.magento.com/guides/v2.3/inventory/index.html)describes the MSI (Multi-Source Inventory) project in more detail.All Inventory Management modules follow the [Single Responsibility Principle](https://en.wikipedia.org/wiki/Single_responsibility_principle).[Inventory management architecture](https://devdocs.magento.com/guides/v2.3/inventory/architecture.html)provides additional insight about the overall structure of these modules.## Installation detailsThis module is installed as part of Magento Open Source. Unless a custom implementation for `InventoryApi` is providedby a 3rd-party module, the module cannot be deleted or disabled.## Extension points and service contractsMagento does not recommend using or referring to classes and other entities in the `Inventory` module. All public interfaces and extension points related to this module are located in the `InventoryApi` module. Use the interfaces and extension points defined in `InventoryApi` to extend this module.