This web site has the following sections:

For business contacts.
Areas of interest
A short overview of my areas of interest, e. g. software development, complex systems, etc.
About me
About me and my hobbies.
The imprint (that is needed by german law).

And there is also:

Blog and news
My blog with articles about books and news from my projects.
Book "Die komplexe Perspektive"
My Book about complex systems and the digital economy (in German only for now).