什么是社会性软件？

Computer-mediated communication
Web 2.0
Web is 2-way medium, interactive by nature
Everyone is a publisher and a contributor
Gives added dimensions to instruction, learning, and performance
Enables people to connect & collaborate
Facilitates formation of online communities
Variety of interactions, user-created content:
1-to-1 (Chat, Instant Message, E-mail)
1-to-many (Blogs, Podcasts)
Many-to-many (Wikis, Discussions)