Synopsis The dictionary is essentially a compilation of terms used in various aspects of e-commerce. An effort has been carried out to bring not only the commonly used terms but also the more specialized and the new terms which have been introduced during the recent developments. This provides a clear understanding of the technical terms and their interpretation which are central to the use of computers and internet in such fields of interest. At certain appropriate places, the line diagrams have been included which help to understanding the meaning of a term. This dictionary will be immense value to the students of commerce, economics, social science and management.