You are looking at web browser screenshots (Firefox, with window decoration removed) of three web interfaces. They are: the DiskStation Manager (DSM) at port 5000/tcp, the SSODS interface at port 9099/tcp and the SqueezeCenter interface at port 9000/tcp. The DiskStation’s IP address (or host name in a sane network) is denoted by xxx.xxx.xxx.xxx.
The sequence of screenshots represent (more or less) the necessary steps to install SSODS and SqueezeCenter on a DiskStation up to the point where it is ready to serve (or: free, as they say) your music.
Click the thumbnails to view the full resolution version.
Note: (on small screens) use the mouse to drag the image within the view.