---
alias: operation-guide-licenses
description: "Valid license keys are required to activate the system and manage module access"
---

# Licenses

In order for the system to work properly, it must be activated with a valid license key.

The Critical Manufacturing base license includes the Core module. All other modules are licensed separately.

Critical Manufacturing consists of a Core plus a set of optional modules that are licensed separately:

![Application Modules](../../introduction/images/application_modules.png)

!!! info
	Each license is valid for an IP address (or IP address range) basis and for a given period of time.

Please refer to the [System Monitoring](../../userguide/administration/system_monitoring.md) section in the User Guide for more information on how to manage license keys.