This document discusses the key aspects of Web 2.0, including that it allows for collaboration and sharing of information online through services that let users interact with pages and each other. Some technologies that power Web 2.0 include Ajax, Flash, Flex, and JavaScript frameworks. Features of Web 2.0 encompass RSS feeds, tags, bookmarks, wikis, blogs, forums, and social networking sites. An advantage is that Ajax programming allows users to update and edit content without reloading the entire page.

2. Technologies used in web 2.0.

3. Features.

4. Advantages.

5. What is web 2.0? It is Second generation of services available on the Web that lets people collaborate and share information online.

7. XML (Ajax),

8. Adobe Flash,

9. Adobe Flex framework,

10. JavaScript/Ajax frameworks.

12. Wiki, Word press, Blogger

13. S ocial forums.

14. Social networking sites like Orkut, Face book, Twitter, Flickr, picasa.

15. Maps : Google, Yahoo, Wiki mapia.

18. We can change and edit the content.

19. In web 2.0 Ajax programming uses JavaScript to upload and download new data from the web server without undergoing a full page reload.