Amateur radio,
often called ham radio, is both a hobby and a service in which participants, called "hams," use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self-training more ...

My favorite mode is Packet Radio, see more. Unfortunately packet radio has lost its attractiveness during the last years due to the internet.

Who wants to learn or relearn CW (like me, hi) have a look at LWCO where you can learn Morse telegraphy (CW) online in your browser.

Look for Call Signs in Germany or worldwide.

Our Amateur Radio League DARC in English.
Amateur Packet Radio, the AMPR.ORG homepage
The Gateways Home Page

Do you want to see the good old packet radio network in Germany? Here is the map!
But I have got also for you the map of almost the whole Europe, hi.