some quests about Socket and Stream

[Heo]

I want to know about and compare the mechanisms of BSD's socket and 
System V's stream.
I have some informations about socket's mechanism, but little about
stream's mechanism (only AT&T's technical journal).
If you know the mechanism of stream, please tell me it.
Or if you know the references for stream mechanism, 
please inform me the references.
Thanks in advance.
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dmheo at kaist
seismo!kaist!dmheo