The Orangi Pilot Project (OPP) has become one of the best known NGO projects in the provision of sanitation. In the 16 years since its inception, the Project has directly and indirectly assisted about one million people in Orangi (Karachi) to improved sanitation. Their intervention has been developed through research into household resources and aspirations in Orangi. From the beginning, OPP staff have sought to minimise external support in order to assist households to achieve their objectives for local development. From their first activities, their work has been extended in two directions. The Project has started to work with the people of Orangi and the surrounding area in the provision of a number of additional services including housing, health, credit for entrepreneurs, education and rural development. More recently, staff have been assisting both government and non-government agencies to initiate a number of new projects in other cities in Pakistan drawing on the experience of the Orangi Pilot Project.