This software package contains a driver for various DCF-77 or GPS devices. The DCF-77 is a rf-sender in Germany, that transmits the german local time and may be received in a lot of European countries. GPS is the "global positioning system" based on satellites, that may also be used to get the standard time (UTC), that may be converted to standard time by this driver. This driver sets the system time on successful receipt of a time data package.