Folksonomy is the practice and method of collaboratively creating labels (or “tags”) to annotate and categorise. The term was coined by Thomas Vender Wal in 2004 as the combination of folk+taxonomy. A taxonomy is a structured classification system with guidelines and generally controlled by authorities and experts. A folksonomy is based on freely chosen keywords by the public.
SIT has started a folksonomy of sitting time, and after a month we already are converging toward a pretty stable folksonomy. After N=200 members of the public filled the folksonomy here is what it looks like as a tag cloud