AJAX

From FiOSWiki

A Rich Internet Application (RIA) used for creating interactive and more responsive web applications. Rich Web Sites and Internet applications such as YouTube are generally heavy in media content, meaning larger downloads and slower performance for the end user. In order to make web pages more responsive and user-friendly, AJAX exchanges small amounts of data with the server behind the scenes, so that the entire web page does not have to be reloaded every time the user requests a change. Each time a content element changes, only that particular piece of content is then updated.