I know of ARCnet, went to a short seminar on that
once at a trade show,
and in fact even have a couple of ISA cards around here someplace,
though I don't forsee me ever using them.
ARCnet and most of the 'nets
were in the price range of a hard disk then.
Also the whole idea of networking was new. For example in 1982 the two
largest networks I knew of were DEC (internal) and Dupont(internal) and
they were around 50 nodes!
I remember those days, thinking of 50 nodes as being pretty good-sized. :-)