Are you engage in licensing discussions, usually around Windows Server, Virtualisation, and more increasingly, VDI. And if you need a quick update, you’re on technical side of things, but want an appreciation of the licensing models, this document (pdf) may be able to help you, and talks about all of the main licensing models, offering a fair amount of useful info around each one, and where one is perhaps more suited than another. Typically, if you’re a company of less than 250 seats, or you’re a Partner working with a Customer of less than 250 seats, then an Open Program is more likely going to be best option for you, however Open can still apply to organisations up to 750 seats, at which point, Select or EA could’ve also been relevant! document would help you with deciding. If you do decide on Open, there’s Open Licence, Open Value, and Open Value Subscription to choose from! Within Open Value, there’s also company-wide and non-company-wide considerations to make! As you can see, it’s easy to start getting lost in the intricacies of it all, this document will help, as will be speaking to a dedicated licensing specialist/reseller, but, there’s a third way to gain a little bit of clarification, and it comes in the form of this short video.