What Are Available IPC Mechanisms Over a Network?

[Will E Estes]

I am interested in mechanisms in UNIX and VMS for interprocess
communication across a network between machines that run the same
operating system and machines that run different operating systems
(e.g., communicating between some process on a VAX and a process
running on a Sun).  If someone does not want to summarize here, I
would also be interested in references to any recent articles that
provide a good overview of this topic.

Thanks,
Will