Daniel Stenberg's long-running IRC history traces Internet Relay Chat from Jarkko Oikarinen's first server in 1988 through early networks, splits, RFC 1459, Undernet, DALnet, and the social problems that shaped the protocol.
An old PC becomes easier to operate safely when it is treated as one replaceable appliance with one narrow job rather than a general-purpose server carrying unrelated services.
The Stargate Internet Museum's UUCP Project page preserves the volunteer effort that mapped store-and-forward Unix connections so software could figure out how to route mail across a network with no single complete map.
Georg Potthast's SIOUX pages preserve packet drivers, NIC detection tools, and practical networking support for DOS-era machines that modern hardware long ago forgot.
Bob Bosen's AskMrWizard turned technical networking and Security Now explanations into animated visual lessons, preserving a useful bridge between audio podcasts and hands-on technical education.
Russ Nelson's personal homepage sits at the intersection of DOS networking, free software, the Open Source Initiative, and an early religious website he created in 1995.