PhilPapers is a comprehensive index and bibliography of philosophy maintained by the community of philosophers, and an Open Access Archive of research in the field of philosophy.
PhilPapers monitors all sources of research content in philosophy, including journals, books, open access archives, and personal pages maintained by academics.
A central aspect of PhilPapers is a categorization system
, by which papers can be categorized into hierarchical categories. PhilPapers has over 4,500 categories, ranging from broad areas to narrow subtopics.