Pinakes (also spelled Pinax) were ancient Greek catalogs of books. They were used to record the contents of libraries and were often written on tablets or scrolls. The name “Pinakes” comes from the Greek word for “tablets.” The most famous example of a Pinakes is the Pinakes of Callimachus, which was created in the 3rd century BCE and listed the contents of the library at Alexandria, Egypt. The Pinakes of Callimachus was a comprehensive catalog that listed the authors and titles of the books in the library, as well as information about their contents. It was organized by subject matter and was considered a model of organization and scholarship. The Pinakes system has been considered as a very advanced and sophisticated method of cataloging and indexing system in ancient times.