Async pipes under SYS3,SYS5

[Doug Gwyn <gwyn>]

I assume you are referring to FIFOs.  Think of these as "named pipes".
The only use I have figured out for FIFOs is for some resource server
(e.g. line printer spooler) which would loop reading from its publicly-
known FIFO awaiting request packets; a request would be accomplished
simply by opening the FIFO under its public name and writing a request
packet to the server.