Many people have discovered the wonderful world of the International Go Server (IGS). Some go there to play a game, some to watch a game, some just to talk to a remote friend (who they actually might never have seen!). But basically, the IGS is a lively international Go club, open 24 hours daily and probably one of the strongest amateur Go club ever.
This manual will show you the possibilities of the IGS and can be used as both an introduction and reference manual.
(By the way, this manual is compiled from the online help files available on the IGS itself!)