The 13th International Workshop on Computational Physics and Materials Science: Total Energy and Force Methods will take place from 11 to 13 January in the ICTP Main Lecture Hall, marking the Centre’s first activity for 2007. About 300 participants will be in attendance. The activity will focus on the electronic structure of complex systems, both in theory and practice. The Workshop is co-sponsored by the International School for Advanced Studies (SISSA) and the INFM DEMOCRITOS National Simulation Centre, Italy.