On Feb 21, 2020, at 10:19, Roger Addy via cctech wrote:
  I am using an HP 9000 Series 360 with a "Thin
LAN" coax card to run a piece of equipment. The LAN connection is not currently being
used.  I'm wondering if it's possible to connect it to a modern ethernet network?
If so, what could I do with it? I found an adapter on Amazon. I would like to be able to
transfer files and possibly print.  The file systems are not compatible except for maybe
ASCII files.  Anyone have any thoughts?  Even if I could transfer files into another HP
9000 system it would be beneficial. 
It's classic 10Mb/s 10BASE2 Ethernet over RG-58A/U.  You can use a repeater to bridge
to 10BaseT twisted-pair Ethernet or 10BASE5 "thick" Ethernet.  It is also easily
(if non-standardly) adaptable to 10BASE5 "thick" Ethernet with a passive BNC to
N barrel adapter on short segments of each, the on-the-wire modulation is close enough to
work.
-Frank McConnell