Why not count NPL? That'd be 1969. What makes an internet an internet is that it's an interconnection of networks. In 1969, ARPANet is still only one network

Why not count NPL? That'd be 1969. What makes an internet an internet is that it's an interconnection of networks. In 1969, ARPANet is still only one network; by definition it's not an internet. So by that conception, maybe we should date the internet from 1977. I skimmed that very article before asking my question. The internet isn't the kind of thing that really can be said to have one birthday, unless there's some kind of artificial-but-nonetheless-widespread consensus to declare one.