Traditionally, a product key has been supplied with computer programs.
With the popularity of the software as a service practices, volume licensing customers only supply their software with credentials belonging to an online user account instead, which is used for other aspects of services and provisioning. Traditionally, a volume licensing key ( VLK), which could be supplied to all instances of the licensed computer program, was involved in volume licensing. For example, Microsoft software available through volume-licensing programs includes Microsoft Windows and Microsoft Office. Customers of such licensing schemes are typically business, governmental or educational institutions, with prices for volume licensing varying depending on the type, quantity and applicable subscription-term. In software licensing, a volume licensing is the practice of selling a license authorizing one computer program to be used on a large number of computers or by a large number of users. Practice of selling a license authorizing one computer program to be used on a large number of computers or by a large number of users
