In the 1980s, HRAF began developing an electronic publishing program with the intention of distributing the Collection of Ethnography exclusively through electronic means. In 1989, HRAF’s Cross-Cultural CDs provided researchers with ten topics including old age, marriage, religion, and human sexuality, excerpted from HRAF’s Sixty Culture Probability Sample Files (PSF). There were five volumes in total. The final volume was released in 1995.