Intro to sockets?

[Suu Quan hplshq]

>/ hpcmfs:comp.unix.questions / quinn at diku.dk (Sebastian Hammer) /  6:24 am  Mar 14, 1990 /
>I've checked the list of common questions, and haven't seen this one, so 
>I guess it is legal.. :)
>   Is there some sort of description of/introduction to the socket-concept
>available (either on a file somewhere, or on paper)?? I've tried to get by
>on the man pages, but either I'm not looking the right places, or the info
>there is a bit thin (The man pages, I think, are generally most useful if 
>you know the material beforehand). 
>
>I'd be grateful for any references.
>
>quinn at freja.diku.dk (The Novice)
>----------

Me too. 
Sebastian,
if you've already received some info thru the mail, would you
copy me please ?