This is revision 5.0 of the driver CD for the Digitus USB-to-serial dongle, model number DA-70156, manufactured by ASSMANN Electronic GmbH. The dongle uses an FTDI FT232R chipset which is widely supported in Windows and Linux out of the box, and doesn't even need a driver CD....
The CD includes the manual for various Windows versions and OS-X, as well as the drivers themselves.
Supported operating systems include Linux x86_64, MacOS, Windows 98, Windows ME, Windows 2000, Windows Vista, Windows XP, Windows CE, Windows 7, Windows 8, Windows 8.1 and Windows 10, as well as the server variants up to Windows Server 2008. Also included is the source code for various Linux/ARM verisons of the driver.
I also included in the upload an image of the 8CM mini-CD, and scans of the C and the accompanying leaflet containing a printout of the GPL.
Personal note: This adapter is the most compatible and best-working one I have ever had, and I have tried many different ones. Cheap chinese clones often disconnect after a while, or have other issues, yet the DA-70156 still works as good as on day 1. It is a bit clunky, and with ~9€ it's not one of the cheapest, but it really is worth it :)