The modern theory of algebras of binary relations, reformulated by Tarski as an abstract, algebraic, equational theory of relation algebras, has considerable mathematical significance, with applications in various fields: e.g., in computer science — databases, specification theory, AI — and in anthropology, economics, physics, and philosophical logic.This comprehensive treatment of the theory of relation algebras and the calculus of relations is the first devoted to a systematic development of the subject. Key Features:- Presents historical milestones from a modern perspective- Careful, thorough, detailed guide to understanding relation algebras- Provides a framework and unified perspective of the subject