- Graphical user interfaces and visualization (X11, Motif, Windows)
- Graphic configuration and visual programming environments
- Cross-platform software development
- Web Technology (HTML, Java, JavaScript)
- Databases (object-oriented, RDMS, noSQL)
- Programming Languages (C, C++, Tcl/Tk, JavaScript, Lisp, Java, Smalltalk, Ada ...)
- Operating Systems (Linux/Unix, Windows, iOS, VMS, ...)
- Heterogeneous Client/Server-Systems
- Hyper-scalable test and load generators
- User-experience testing
- Network-protocol testing
- ...