Health systems development is the main focus of OSD and is one of WHO’s priority areas of work. Their purpose is to undertake analytical work and provide technical and policy advice to WHO Member States to strengthen their health policies and strategies and improve the performance of their health systems functions. The OSD website provides an overview of some of their key areas of work, links to a number of documents relating to health service provision, including a World Directory of Medical Schools, and recent and upcoming events in this area.