- XApplication at "x-ozlib://mathweb/share/XApplication.ozf"
- XService(simple:SimpleService manager:ServiceManager) at "x-ozlib://mathweb/sys/XService.ozf"
- ChorusClient at "http://www.coli.uni-sb.de/cl/projects/chorus/choli2/chorus/mathweb/chorusclient.ozf"