Yes, we used MMDF quite extensively until TCP/IP. I remember paying $800 for a network card for a PC in the mid 90's. Just this week, I discarded a box filled with old 10/100 cards. From: "Mike Knell via TUHS" To: "Paul Ruizendaal" Cc: "TUHS main list" Sent: Thursday, March 18, 2021 7:27:26 AM Subject: Re: [TUHS] Micnet Was: Re: Surprised about Unix System V in the 80's - so sparse! > On 18 Mar 2021, at 10:44, Paul Ruizendaal via TUHS wrote: > > Does anybody here know the backstory to Micnet and/or how it worked? The Xenix communications manual has plenty of detail on how to set it up: http://www.nj7p.org/Manuals/PDFs/Intel/174461-001.pdf Looks as if it built a routed network among a set of Xenix machines using conventional serial lines, including remote login / file transfer / mail ervices. Would have been quite a big selling point for software development shops in the days before TCP/IP and ubiquitous connectivity, especially as it looks as if it was decentralised and didn’t require any extra server hardware. MMDF could route mail between Micnet and UUCP. Mike