Concurrent Licenses
If you have a concurrent license for an application, you are allowed to install as many copies of the application as you like, but you can only use a certain number of copies of the application at any given time, as specified by your organization's agreement with the vendor.
You can use the license allocation feature to help your organization adhere to its concurrent license agreements. License allocation will help you determine what groups are allowed to access a license, and use control profiles to determine what happens when a license is not available.