Web 2.0

Web 1.0  is an old internet that began with the release of the WWW to the public in 1993.  It only allows people to read from the internet and not edit anything. It refers to the state of the World Wide Web, and any website design style used before the advent of the Web 2.0.

Web 2.0 on the other hand allows us to read and be authors of it like Wikipedia allows everybody to write articles of what they think something is and people can just edit it. It's all about writing, peer-to-peer, blogs, RSS, tagging and sharing.  

Web 2.0 examples: 

-MSN
-Skype
-Wikipedia
-Blogger
-My Space
-Facebook
-Youtube
-MetaCafe

What is Library 2.0? is a loosely defined model for a modernized form of library service that reflects a transition within the library world in the way that services are delivered to users. The focus is on user-centered change and participation in the creation of content and community. The concept of Library 2.0 borrows from that of Business 2.0 and Web 2.0 and follows some of the same underlying philosophies.