I found this piece on the 100 oldest internet domain names very interesting. Symbolics.com is the oldest (Who?? ;-) )
You will see companies like Intel, AMD, AT&T, HP, Adobe on this list, but one company that was surprisingly missing was Microsoft. I would have figured that they would have been one of the first domain names. Back in the late 80s Microsoft was still finding its roots and wasn't the success it is today; but still, it was interesting to see this omission. They didn't buy their domain until 1991.
Octopus.com is on the list, but not microsoft.com :-)