Andreas Kohne is the Head of Business Development and Digital Media Sales at Materna TMT, Dortmund, Germany. Before he joined the company in 2008, he worked in IBM's Research and Development Lab in Böblingen. Andreas Kohne studied computer science and business administration at the Technical University Dortmund, and he writes books on computer science and business related topics. Volker Wehmeier has a degree in business administration and a degree in administration. For many years, he has worked in market-leading American and German companies in a responsible position for business area development and the generation of new business. He is the author of numerous specialist articles and has been teaching for several years on subjects related to e-Business.