This book comes from the need and urgency (especially expressed in the areas of information retrieval with regard to images, audio, Internet and biology) to obtain a tool to compare data. The book will provide a powerful source for all researchers who use mathematics as well as for athletes themselves.

While excessive specialization and linguistic disciplines are isolated researchers, this dictionary attempts to be a "catapult" and "oikoumeni", providing some access and advancement but without the path of scientific development. This balance is the main philosophy of this dictionary, which defines its structure and style.

Key features: - Unicity: is the first book that addresses the basic idea of ​​distance in generality. - Interdisciplinarity: This dictionary is larger in scope than the majority of thematic dictionaries.

- Encyclopedic: While it seems very difficult to produce the Encyclopedia of distances, this book (through its scope and short introductions and organization) provides the main material for him and future educational programs in some parts of this article. - Applicability: distances, as well as distance concepts and models, are provided in a ready-to-use manner.

- Merit: The need and urgency of such a great dictionary was in many huge areas, esp. Information retrieval, image analysis, speech recognition and biology.

- Accessibility: It is easy to define definitions by subject or index in alphabetical order; introductions and definitions are reader-friendly and largely independent of one another; text, in 3D HTML style, is still organized through vague references similar to boldfaced to similar definitions.