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).
... The racial makeup of the town is 98.03% White, 0.59% African American, 0.00% Native American, 0.52% Asian, 0.13% Pacific Islander, 0.26% from other races, and 0.46% from ...