"This outline supplements the topical classification of the 'Outline of Cultural Materials' with a new outline organizing and classifying the known cultures of the world. The new system: (1) expedites the beginning of actual processing of information into the Human Relations Area Files, (2) permits excerpting of sources processed that pertain to cultures other than those for which files have been established, and (3) assures that societies selected for processing approach the ideal of a representative sample of the world's cultures. Thus, this outline is a reference to files of materials on 400 cultures covering eight geographical regions of the earth. Used in conjunction with the 'Outline of Cultural Materials', researchers can locate data on a cross-section of the world's cultures in 79 major divisions of information pertaining to cultural background. A sample and index of world cultures are included."