"There’s no disputing that Facebook is the poster child for social networking. It is the platform for building social connections online and keeping up to date with what’s happening in your social circle. It is one of the two most important platforms in social media.
The other one is Twitter. However, if you try to describe Twitter as a “social network” to anyone who works at the company, they’ll quickly correct you. Internally and externally, Twitter describes itself as an “information network.”
What exactly is the difference? And is there one?"
Read more by Ben Par at www.mashable.com