Web 2.0
Web 2.0 is a complicated concept that generally means the new era of internet technologies. Today there are disputes about whether web 2.0 actually exists or not, although the majority of people incline to the opinion that it does. The most common features that are considered to be characteristic for the new web technologies are the methods of designing systems that develop with time. This means that the more people go to this or that website that's created with the help of technology, the more advance and developed it gets. This includes repeated editing of content by the visitors themselves, as well as constant addition of new content, as well as improvement of traffic ranking. The web 2.0 is not a separate technology recognized by everybody. The term just denotes the general trend of updating the existing web technologies and design of websites in order to improve creativity, security of data transactions, collaboration, information sharing etc. Some specific technologies can be distinguished that may be considered integral parts of this general trend. Among them are AJAX, web syndication, web services, tags, XML and many others. AJAX (which often is used as a synonym for Web 2.0) stands for Asynchronous JavaScript and XML – this is basically an approach that allows for websites to asynchronously download the needed content from their databases without actually having to be reloaded completely. Such well-known services as Google maps were created using this technology.