VOL meaning in Computing ?

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. 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. For example, Microsoft software available through volume-licensing programs includes Microsoft Windows and Microsoft Office.

Traditionally, a volume licensing key (VLK), which could be supplied to all instances of the licensed computer program, was involved in volume licensing. 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.