Definition#1_Assignment#2

1. AdSense
This service is considered to be Web 2.0 because it is different from traditional web advertising. Instead of paying only for ad impression there is also per click service.

2.BitTorrent
It is a peer-to-peer file sharing system. People can share music, movies and other contents for free. But the system is very controversial because many companies believe they are losing money, since many people can share one file.

3.Wikipedia
It is an online version of an encyclopedia. The main difference is that Wikepedia is based on content submitted by volunteers across the world.

4.Blog
It is a website which provides an online version of diary, other writing, graphic or video that doesn’t require publisher or editing.

5. RSS (Really simple syndication)
It is a family of web feed formats to make it easy to share headlines or full text content with other websites. It also makes it easy for people to collect lots of content. For example, my yahoo and google reader are free tools to collect RSS feeds.

6.NNTP (Network News Transfer Protocol)
It is an Internet application protocol mainly for reading and posting net news.

7.Google Maps
It is a worldwide mapping service, which provides detailed geographic information for most of the Earth.
“It offers street maps, a route planner for traveling by foot, bicycle, car, or public transport and an urban business locator for numerous countries around the world. It also can help with finding” (Wikipedia)
However, some areas are restricted especially by government for some security.

8. Amazon
It is America’s largest online retailer, which sells lots of product lines of books, DVD, CDs, Toys, electronics, apparel and so on.
Their web services are provided in *SOAP (Simple Object Access Protocol) and *REST (Representational State Transfer).

9. Flickr
It is a community site for sharing images and video. Many bloggers use this site to show their photographs. The site is also easy to search some specific picture with key words. It uses Ajax.

10. Ajax (Asychronous Java Script and XML)
It is a combination of technologies used in web browser.
The essay by Jesse James Garrett defines Ajax as follows:

“Ajax isn’t a technology. It’s really several technologies, each flourishing in its own right, coming together in powerful new ways. Ajax incorporates:

* standards-based presentation using XHTML and CSS;
* dynamic display and interaction using the Document Object Model;
* data interchange and manipulation using XML and XSLT;
* asynchronous data retrieval using XMLHttpRequest;
* and JavaScript binding everything together.”