What is an Open License?

SophTheMoph used Ask the Experts™
Can some please explain in simple terms what an Open License is, with regards to purchasing licenses from Microsoft? I understand a little about Volume Licensing, but can't get a grip on what an Open License is.
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Technology and Business Process Advisor
Most Valuable Expert 2013
Microsoft Open License is a volume licensing program for small- to mid-sized companies with fewer than 250 desktop computers. The program provides a simple, flexible, and cost-effective way to buy the latest Microsoft technology to meet your organization's needs and procurement.
Open License Agreement benefits include:

    A minimum purchase of just five licenses
    Discounts off the retail price of software
    A one-time transaction, so that you can pay at the time you purchase software
    The right to create a standard image and deploy it on multiple machines
    The right to transfer a licenses from one machine to another
    The ability to obtain licenses from multiple locations through a worldwide reseller channel
    The ability to track and manage licenses by using online tools
    Access to Microsoft Software Assurance, an enhanced maintenance program that helps you get the most out of your software investment
    A single authorization number that can be shared with qualified affiliate organizations

To be clear, the above is from http://www.softmart.com/mcs_help/volume-licensing-open-license.asp but seemed quite clear to me.

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial