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Old Usenet Maps

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.