Question: The metafamily of graphical operating systems developed, marketed, and sold by Microsoft offers what kind of help to musicians?
Related documents: [0]  [DOC] WinSingad is a Microsoft Windows based software for singing training. [END] 
[1]  [DOC] Microsoft Windows, or simply Windows, is a metafamily of graphical operating systems developed, marketed, and sold by Microsoft. It consists of several families of operating systems, each of which cater to a certain sector of the computing industry with the OS typically associated with IBM PC compatible architecture. Active Windows families include Windows NT and Windows Embedded; these may encompass subfamilies, e.g. Windows Embedded Compact (Windows CE) or Windows Server. Defunct Windows families include Windows 9x, Windows Mobile and Windows Phone. [END] 
Answer: 
software for singing training
software for singing training