Knowledge management began in the private sector but has since been adopted by governments and international development agencies alike. In the mid-nineties, Stephen Denning established the Knowledge Management Program of the World Bank, which has served as the model for applying KM to international development assistance or KM4D. This chapter differentiates corporate KM from KM4D. It presents a typology and enumerates KM4D sectors and themes used by the international development assistance community in the past two and a half decades.