Social software is any software that supports group communications. The dynamics of social software are significantly different from traditional interactions.
Social Software and the Politics of Groups, Clay Shirky, First published March 9, 2003 on the "Networks, Economics, and Culture" mailing list (http://www.shirky.com/writings/group_politics).
... between the axis and the groove rims will accelerate or brake the spinning gyroscope, with a maximum effect when the axis starts "rolling" inside the groove. (Compare ...