What is Visual Studio?
It is a comprehensive collection of application development tools and services for Mobile, Cloud, Windows, Android and iOS platforms all from within one Integrated Development Environment (IDE).
It supports native development with the following languages: Visual C++ or .NET development with Visual Basic .NET, C# or F#. It covers a range of technologies including Windows Forms, ASP.NET, ASP.NET MVC, Silverlight, WPF, Windows Azure, SQL Server, Microsoft Office, SharePoint and Windows Phone.
For a comprehensive comparison of current Visual Studio Subscriptions: