Server designed to transform data streams to better match device capabilities. For example, Wireless Application Protocol (WAP) gateway servers convert HTML to Wireless Markup Language (WML) for wireless devices, and a number of products can reformat HTML for devices such as mobile phones and PDAs. Today, HTML-based servers predominate. HTML can be made aware of a unique device requesting content; however, more often, “shadow” Web server applications are created to draw off and reformat native content.