This will probably be the first window you will see starting the client. The window appears after successfull connection to metaserver that holds list of available netrek servers.
Here is how it looks:
There are several types of games played in Netrek Universe. It could be Bronco, Hockey, Chaos, Dogfight and some others. Most of servers you'll see these days are either Bronco or Hockey. Bronco is the most popular type of Netrek, so go on and click on some Bronco server to connect to the game.
In order to join the game to play you should point on one of the servers and click
left mouse button.
If you wish to observe the game instead of playing - click right mouse button.
Clicking on one of yellow links will open your browser on the link's main site