There are many several historical maps available on the Internet that document the early Usenet structure. The early Usenet ran across a well defined network of sites, and quickly expanded from the U.S. to Canada, Europe, and beyond. In order to keep track of the network structure, creatively structured text-based maps were distributed on the Usenet starting in 1981. An example of an early map showing the schematic of Usenet sites and inter-connections from June, 1981, is provided below.
(ucbvax) +=+===================================+==+ | | | | | | wivax | | | | | | | | | microsoft| uiucdcs | | | | genradbo | | | | | | (Tektronix) | | | | | | | purdue | | | decvax+===+=+====+=+=+ | | | | | | | | | | | pur-phy | | tekmdp | | | | | | | | | | | +@@@@@@cca | | | | | | | | | | | | | +=pur-ee=+=+=====+===+ | | | csin | | | | | | | | +==o===+===================+==+========+=======+====teklabs=+ | | | | | | | pdp phs grumpy wolfvax | | | | | | | | | | | cincy unc=+===+======+========+ | | | | bio | | | | | (Misc) | | (Misc) | | | | sii reed | dukgeri duke34 utzoo | | | | | | | | | | | | +====+=+=+==+====++======+==++===duke=+===+=======+==+=========+ | | | | | | | | | | | u110 | bmd70 ucf-cs ucf | andiron | | | | | | | | | | | | | red | | | | | pyux | | | | zeppo | | | | | psupdp---psuvax | | | | | | | | | | | alice | whuxlb | utah-cs | | houx | allegra | | | | | | | | | | | | | | | | | | | +--chico---+ | +===+=mhtsa====research | /=+=======harpo=+==+ | | | | | | | | / | | | | hocsr | | +=+=============+=/ cbosg---+ | | | ucbopt | | | | | esquire | | : | | | cbosgd | | | : | | | | | | ucbcory | | eagle==+=====+=====+======+=====+ | | | : | | | | | | | | | +-uwvax--+ | : | | | mhuxa mhuxh mhuxj mhuxm mhuxv | | | : | | | | | | : | | | +----------------------------o--+ | : | | | | | | ucbcad | | | ihpss mh135a | | : | | | | | | | : --o--o------ihnss----vax135----cornell | | : | | | | | +=+==ucbvax==========+===+==+=+======+=======+=+========+=========+ (UCB) : | | | | (Silicon valley) ucbarpa cmevax | | menlo70--hao : | | | | ucbonyx | | | sri-unix | ucsfcg1 | | | | Legend: | | sytek====+========+ ------- | | | | - | / + + Uucp sdcsvax=+=======+=+======+ intelga zehntel = "Bus" | | | o jumps sdcarl phonlab sdcattb : Berknet @ Arpanet- UUCP/USENET Logical Map - June 1, 1981 / mods by S. McGeady 11/19/81. |
Resources. The following sites provide records of old maps of the Usenet network.