Slides from a presentation on the Knowledge Organization System (KOS) work program for GBIF. KOS developments for biodiversity information resources and input to the emerging Vocabulary Management Task Group (VoMaG). Links GBIF KOS prototype tools, http://kos.gbif.org/ Tool: Semantic Wiki prototype, http://terms.gbif.org/wiki/ Tool: ISOcat prototype demo, http://kos.gbif.org/isocat/ GBIF concept vocabulary term browser, http://kos.gbif.org/termbrowser/ GBIF Resources Repository, http://rs.gbif.org/terms/ GBIF Vocabulary Server, http://vocabularies.gbif.org/ GBIF Resources Browser, http://tools.gbif.org/resource-browser/