Paul invented the internet Domain Name System (DNS).
Let that sink in.
In 1983 Paul recognised that holding the lookup between human readable names and machine readable numbers was not going to be practical in host files. In RFC 882 and 883 he proposed DNS.
Everything we do today on the internet relies on DNS. Paul's RFCs were published when the number of internet nodes was around 1000. The system he proposed handles in excess of 1,000,000,000 nodes today.
It seems only fitting that we say Happy Birthday!