Transportation system in Zurich

[martin pilka]

Hello,
we tried to find out how to get from hotel Rex to conference and found this:

http://www.gis.zh.ch/zvv/

After you enter addresses, you get attached screenshot. Now, I have no idea
what does it actually mean. These questions come to my mind:

* Is is a bus, train, or something else?
* What is the number of it? I.e. bus number X
* What time does it go?

It seems I have no clue about Zurich transportation system. Anybody can help?
Thanks,
Martin