An information server system is responsive to page specifications to render information pages at a plurality of clients that use different client software and that have widely different characteristics. Information pages are authored in a generic page specification format that is not limited to any particular client or client software. In response to a request for the information page, the server system selects and executes a page renderer that is compatible with the client software of the client requesting the information. The page renderer converts the page specification of the information page to an instruction sequence that is tailored particularly for the requesting client. The conversion is accomplished by selecting and executing a plurality of independently-executable pane renderers.