From the Web Archives…
This appears to be the first actual website on the World Wide Web (W3 as it was called in those days). It is just a brief list of links that explain what the web is, the people developing it, its history and so forth.
The first registered website still in existence is not a well known one. It is symbolics.com registered 15-Mar-1985. Microsoft.com? Not even in the first 100 sites registered. Apple.com? It comes in at #64 registering on 19-Feb-1987.
The web, the internets, the tubes all seem to have arrived overnight. Actually, it took a number of years to develop into even the rudimentary tool it was by the time Microsoft saw its potential.