Martin Kütz is working as a professor for business information systems at the Anhalt University of Applied Sciences in Köthen (Germany). His research and teaching is based on 27 years work in IT management, management consulting and IT consulting. He always aims at building bridges between information technology and economics. He is convinced that technology has to follow business. This book on E-Commerce was written under this aspect. Martin Kütz also is a well known expert for managing IT organisations with key performance indicators and scorecards.