What’s so ‘social’ about the social web?

To me it always seemed obvious why we called social software or social media the way we do. I have read a number of articles talking about dispersed knowledge workers who are collaborating via the Internet. But does it really have to be that sophisticated? In Niall’s book I found a small collection of activities that make the web social. This is how we derive the meaning. The former description is still correct, yet the activities named below better reflect our real world behavior.