The initials “CISM” stand for “Calcul Intensif et Stockage de Masse”, or high-performance computing and mass storage. It was created in 2004 at UCLouvain by the users of the HPC facilities coming from different Departments in the University. The CISM operates the scientific computing clusters and the scientific data storage systems installed at UCLouvain, organizes and delivers training sessions about HPC targeted at researchers and offers consultancy and expertise in code porting, optimization, compilation, etc.