The MSDN Operating Systems Subscription provides access to the latest Microsoft operating systems for desktops, laptops, line-of-business applications, and enterprise networking. The MSDN Operating Systems subscription provides you with quick and convenient access to essential Microsoft platform technologies, technical resources, and support to design, build, and test applications for Microsoft Windows, the Web, mobile devices, and XML Web services. The software download site provides instant access to a range of past and current software available in your subscription, in addition to available new releases or upgrades to your subscription software.