Volume license key

In software licensing, a volume license key (VLK) denotes the product key used when installing software licensed in bulk, which allows a single product key to be used for multiple installations.

This form of licensing typically applies for business, government and 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 Windows Vista, Windows 7 Enterprise, Windows 8 Enterprise, Windows Server 2008, Microsoft Office 2007 and many others.