Unknown file extensions / 2

Below, you can find a list of Unknown file extensions and the file types associated with it. In the Microsoft Windows 7/8 operating system, you can view or change the associations with the assoc command.

xkc
Unknown XKC File
xl5
Unknown XL5 File
xlxs
Unknown XLXS File
xnxx
Unknown XNXX File
xox
Unknown XOX File
ywd
Unknown YWD File
zkt
Unknown ZKT File
zvz
Unknown ZVZ File