The National Dryland Salinity Program (NDSP) is a collaborative research and development effort. The first five-year phase of the Program was completed in 1998. This preliminary phase focussed on improving our understanding of the causes of dryland salinity and established a collaborative, national focus for salinity research, development and extension investment. A larger, second five-year phase is due for completion in 2003. This phase continues to identify and research the knowledge gaps in our understanding of the causes and impacts of dryland salinity, with a strong focus on developing practical, profitable and sustainable solutions and establishing wider networks. It is also investigating socio-economic arrangements that encourage or impede appropriate management of salinity, new production options using saline resources and integrated management of saline landscapes. This investment profile provides a detailed summary of current NDSP projects and previous work from Phase 1 of the Program.