Published quarterly, History and Philosophy of Logic is devoted to the study of the historical development of logic and its broader philosophical concerns. The journal also deals with general philosophical questions in logic - existential and ontological aspects, the relationship between classical and non-classical logics - including their historical development. In addition it treats the relationships between logic and other fields of knowledge, such as mathematics, physics, philosophy of science, epistemology, linguistics, ontology, psychology, and computing. History and Philosophy of Logic also contains special features on manuscript collections and projects in progress, translations of important or neglected historical texts, and a substantial book review section including essay reviews. Members of the British Logic Colloquium are eligible for a privileged discount rate. Impact Factor-0.318.