Quoting Linus Sphinx (sphinxtar(a)gmail.com):
Does anyone still use listserv?
As a minor correction to my prior post, the _very_ first implmentation
of LISTSERV was written _prior_ to 1986 by Ricky Hernandez of EDUCOM,
based on a software design by Ira Fuchs of BITNET and Dan Oberst of
EDUCOM. Eric Thomas's reimplementation, originally called Revised
LISTSERV, replaced it in 1986.
Some more of that history is linked from this mailing list FAQ page on
my Web server.
http://linuxmafia.com/pub/skeptic/skeptic_faq.html#history
(I note that ListProc, which I alluded to earlier, is actually open
source -- but incredibly crufty at this late date.)