I think one mistake in this article is calling .Mac a successor of CyberDog. This is incorrect because if I can remember correctly CD was just a set of programs

I think one mistake in this article is calling .Mac a successor of CyberDog. This is incorrect because if I can remember correctly CD was just a set of programs and APIs on the client side. Unlike .Mac there was no service component attached to it. Apple did not offer a CyberDog service of any kind. And vice versa, .Mac was a closed system component without any APIs that developers could use in their applications. I think that came much much later.