Category Theory (Popularity: ): This expository article is an entry in the Stanford Encyclopedia of Philosophy. Categories, Quantization, and Much More (Popularity: ): Introductory article by John Baez. The Computational Category Theory Project (Popularity: ): The aim of the project is the development of software on a wide variety of ... Category Theory and Homological Algebra (Popularity: ): In the "known maths" series. A Gentle Introduction to Category Theory (Popularity: ): Lecture notes by Maarten M. Fokkinga introducing some important notions from category theory, in particular ... Structures Directory (Popularity: ): Email directory of logicians, algebraists, and programming linguists working primarily on structural problems in mathematics ... Open Problems on Model Categories (Popularity: ): Problems on model categories listed by Mark Hovey at Wesleyan University. Categories Home Page (Popularity: ): Web page for the category theory mailing list. Categorical Myths and Legends (Popularity: ): An archive of stories about category theorists. CT Category Theory (Popularity: ): Section of the e-print arXiv dealing with category theory, including such topics as: enriched categories, ...