This book is the result of the Fourth International Conference on Computer Aided Architectural Design. This CAAD-conference focussed on the power of the network and the influences of local innovations on global trends. Ideas and evolutions take place increasingly on a global scale. International trends in architectural style and technological innovations are spread worldwide and they are adapted to local conditions. The local context remains extremely important as it gives diversity. Architects travel and build their work all around the world creating an international space for development and reflection of ideas. Computer Aided Design and Internet Technologies support and possibly encourage, the globalization for trends and methods.