There’s a discussion on the DC-SOCIAL TAGGING mailingslist about what so social about social tagging.
Many interesting viewpoints have emerged. It started with a question by Liddy Nevile:

I would like us to think carefully again about calling it social tagging - I suspect that ’social’ tagging has a theoretical implication - that it’s tagging […]

My supervisor Jesper Schneider asked me “What does social mean?” the other day. Thats actually a very good question. So here I list some definitions, while I ponder my definition of social.
Wikipedia has many more or less helpfull definitions. In the introduction there’s a rather good sentence
“…its meaning is at times vague, suggesting that it […]