The license for the program means the right to use it on a given workstation or by a given user.

There are single user licenses, there are computer licenses, and there are team or site licenses (license user group locations).

The license for the program can be the program key, or an account on the producer's server with a license assigned to the account.

Licenses are perpetual or annual.The Saas licensing model is currently developing:Software as a service, where these are usually annual licenses (annual license service).

A common example here are licenses for remote desktop software:  

• Anydesk licenses    
• TeamViewer licenses
• RealVNC licenses
• Supremo licenses