1. Introduction

2. The main types of SNS:

3. Cyworld
What is cyworld?
Cyworld’s history
Cyworld’s main article
(Nate On)
Cyworld’s effects on
internet culture

4. Facebook
What is facebook?
Facebook’s founder: Mark Zuckerberg
Facebook’s history: facemash and
thefacebook
Effect on politics

5. Twitter
What is Twitter?
Twitter’s founder
Twitter’s current situation
Use in education