CECAM (Centre Européen de Calcul Atomique et Moléculaire) is an organization devoted to the promotion of fundamental research on advanced computational methods and to their application to important problems in frontier areas of science and technology. As the name suggests, the traditional focus of CECAM has been atomistic and molecular simulations, applied to the physics and chemistry of condensed matter. Over the last twenty years, powerful advances in computer hardware and software have supported the extension of these methods to a wide range of problems in materials science, biology and medicinal chemistry.