3. A system according to claim 1, further comprising: the presentation space buffer storing computer display information representing a plurality of computer displays; the display control receiving the presentation space data stream containing the computer display information representing the plurality of computer displays; and the host extension converting substantially the entire presentation space data stream containing the computer display information representing the plurality of computer displays into a single markup language document.
3. A system according to claim 1, further comprising: the presentation space buffer storing computer display information representing a plurality of computer displays; the display control receiving the presentation space data stream containing the computer display information representing the plurality of computer displays; and the host extension converting substantially the entire presentation space data stream containing the computer display information representing the plurality of computer displays into a single markup language document. 4. A system according to claim 3, wherein the plurality of computer displays comprises a single session running on the host computer.