Web 2.0 refers to web applications that facilitate interactive information sharing, user-centered design, and collaboration on the World Wide Web. Examples include social networking sites like Facebook and Twitter, video sharing sites, wikis, and blogs. Social networks consist of individuals or organizations connected by relationships. RSS allows users to subscribe to continually updated content from sites through a feed reader. APIs enable interaction and sharing of content between applications and sites. Widgets are embeddable applications that can turn personal content into dynamic web apps shared on websites.

1. Web 2.O

2. INTRODUCTION "Web 2.0" is commonly associated with web applications that facilitate interactive information sharing, interoperability, user-centered design,and collaboration on the World Wide Web. Design Patterns and Business Models for the Next Generation of Software.

3. EXAMPLES Hosted services Web applications Social-networking sites Video-sharing sites Wiki Blogs.

4. SOCIAL NETWORKS A social network is a social structure made of individuals (or organizations) called "nodes," These nodes are tied by one or more specific types of interdependency,such as friendship, kinship, financial exchange, dislike, sexual relationships, or relationships of beliefs, knowledge or prestige.

5. EXAMPLES Face Book Twitter Myspace Blog Wiki Flicker

6. RSS RSS Means Really Simple Syndication or Rich site summary Allows users to subscribe to sites with continually updated content Accessed through a feed reader

7. API Application Programming Interface. API is an interface implemented by a software program to enable interaction with other software. API are implemented by applications, libraries and operating systems to determine the vocabulary and calling conventions the programmer should employ to use their services.

8. USES OF API Photos can be shared from sites like Flicker and Photobucket to social network sites like facebook and Myspace. Content can be embedded Content can be dynamically posted Video content can be embedded on sites which are served by another host.

9. WIDGET A widget is a stand-alone application that can be embedded into third party sites by any user on a page where they have rights of authorship. a webpage, blog, or profile on a social media site Widgets are fun, engaging, and useful applications that allow users to turn personal content into dynamic web apps that can be shared on just about any website.

10. GADGET A gadget is a small technological object that has a particular function, but is often thought of as a novelty Computer program that provide service without need a independent application to be lanched for each one,but instead an environment that manages multiple gadgets. Google

11. TAG TAG is keyword used to describe an article or website TAG are often used as social bookmarks,social news ,blogs for help user for relevent content It is very flexible Enhanced descriptive information

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