164 Territorium Online GmbH develops a native, standalone TCP/IP server running as NT service or daemon on Microsoft Windows and Linux, respectively, which interfaces to UMN Mapserver. The application accepts map and query requests in XML form based on a schema close to ArcXML with adaptations to Mapserver's business logic and without some of the unnecessary overhead of the ESRI counterpart. Using Mapserver's C API it produces map images and query results and shapefile extracts out of the requested options. Includes support for on-the-fly adding of "acetate"/annotation layers, renderers and much more. Significant effort has been put into investigating Mapserver's threading support and exploring possible optimizations, resulting in a multithreaded, performance oriented but stable and resource efficient server application. The idea is to introduce in the application and discuss possible improvements (including a standalone WMS/WFS server based on Mapserver) and the use of such a technique for the community. FOSS4G2006 - Free And Open Source Software for Geoinformatics Demo Fest Andreas Albarello andreas.albarello@territoriumonline.com Ivo Planötscher ivo.planoetscher@territoriumonline.com Andreas Albarello andreas.albarello@territoriumonline.com Ivo Planötscher ivo.planoetscher@territoriumonline.com <MaKaC.conference.ContributionType object at 0xb492f1ac>