# Inventory module The `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 details This module is installed as part of Magento Open Source. Unless a custom implementation for `InventoryApi` is provided by a 3rd-party module, the module cannot be deleted or disabled. ## Extension points and service contracts Magento 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.