Visual Studio Professional 2015 supports you to create applications across devices and services, using a single solution with a consistent development experience. It has the tools you need to deliver apps, as well as mobile web apps across any device, web site, cloud service, and more.

It is recommended that you sign in using the Microsoft account associated with your active MSDN subscription in order to unlock Visual Studio. By signing in, your IDE settings will sync across devices, and you can connect to online developer services. Some customers may also have access to product keys which can be used to unlock Visual Studio.

VS Release Notes
TFS Release Notes
VS Known Issues
System Requirements
Compatibility