The 4th International Symposium on Materials and Sustainable Development ISMSD2019, will include a 3-day Conferences (12 - 14 November). Organized by the Research Unit: Materials, Processes and Environment (www.urmpe.dz) and University M'hamed Bougara of Boumerdes, this symposium follows the success of CIMDD 2013-2015-2017 and continues the traditions of the highly successful series of International Conferences on the materials, processes and Environment. The Symposium will provide a unique topical forum to share the latest results of the materials and sustainable development research in Algeria and worldwide.