Ajax or Asynchronous JavaScript and XML is a term describing a web development technique for creating interactive web applications using a combination of:

• HTML (or XHTML) and CSS for presenting information
  
• The Document Object Model manipulated through JavaScript to dynamically display and interact with the information presented
  
• The XMLHttpRequest object to exchange data asynchronously with the web server. (XML is commonly used, although any text format will work, including preformatted HTML, plain text, and JSON)
  

Like DHTML, LAMP, or SPA, Ajax is not a technology in itself, but a term that refers to the use of a group of technologies together. In fact, derivative/composite technologies based substantially upon Ajax, such as AFLAX are already appearing.
Ajax applications use web browsers that support the above technologies as a platform to run on. Browsers that support these technologies include Mozilla Firefox, Microsoft Internet Explorer, Opera, Konqueror and Apple Safari.

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웹 상에선 요새 한참 인기인 중인 기술. RichInternetApplication 은 Flash 쪽이 통일할 줄 알았는데 (MacromediaFlex 를 보았던 관계로) 예상을 깨게 하는데 큰 공로를 세운 기술.;
MacromediaFlex 가 인기를 끌지 못한 이유? 글쌔. 서버 한대당 2만달러가 넘는 비싼 라이센스 때문이 아닐까. -_a -1002
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