Computing and programming are very important activities in our institute. Our students and collaborators have privileged access to world-leading supercomputers, but also to smaller local systems. From the Tier-0 supercomputers available through the PRACE allocation scheme in Europe to your own laptop, a complete hierarchy of machine is required to test, develop and deploy your ideas and change the world. Whether you need to simulate a complex dynamical system or to analyse a large set of medical data, you will need a computer and an application to perform your task. It is however important to identify the optimal tool for this, and to get the proper training to use this tool. These pages are here to guide you.