IBM PC Network

I, of course, came from UNIX and TCP/IP land, and 802.2 and all these crazy protocols were just bizarre to me.? I had bought the Comer books right after college because I was trying to implement TCP/IP on my Commodore 64 (got SLIP, TCP, and IP working, back in 1995 or so), and there was a guy at the company named Walter Falby who was a uber 370 programmer.? At one point, he was leading the Compuware group writing a program that would trick the 370 into feeding different dates to regular apps on the machine, to be sold as a utility to help companies test their SW for the year 2000 rollover.? Deep knowledge of 370 assembler.? Reminds me of "Mel" of the free verse story fame.? Anyway, Falby started asking me about TCP/IP, and I was happy to share what I knew.? He borrowed my Comer books and printouts of the RFCs (not sure where I printed them from back in those days, but they were available somewhere) and implemented a full TCP/IP stack for the 370, they called it Host Communications Interface (HCI).? I'm not sure if Compuware gave HCI away to customers or they just charged a bit for it, but I remember Walter being stupified IBM was selling TCP/IP for such a high price and deigned to do something about it.