Librarians are specialists in data retrieval, often in charge of information resources that include physical or virtual books and other publications, and other media resources, that can be many millennia old and nearly forgotten or newly-created.
Although there are numerous biont librarians in various polities around the Terragen Sphere, a significant fraction of librarians are vots, aioids or superturing AI, or occasionally subroutines of transapients or archai, that are experts in accessing, categorizing and cataloguing a wide range of knowledge or information resources.
A skilful librarian is able to quickly access and provide vast amounts of information from recorded or encoded literary, scientific, and other topics, and will search for material that is not in their databases, searching the Known Net and even inquiring of remote computronium nodes. In the info-flood that is the modern galaxy, librarians are an essential group that is necessary for everyday functioning in the worlds of the Nexus.
Perennial Library - Text by M. Alan Kazlev Any of a number of libraries of perennial memes that is used (especially by Universalists) to interpret or decode higher toposophic mysticism. Critics say that rather than elucidating the S>1 teachings such a methodology imposes a modosophont procrustianism on them.