PSNC, as a High-Performance Computing Centers, has one of the best Polish clusters called Orzeł (Eagle) with 1.7 PFlops of computational power. It is also one of the most energy-efficient systems, which was created in the region of Europe, the Middle East and Africa (EMEA). PSNC computing resources are used by scientists working in various fields of science: astrophysicists, biologists, chemists, and physicists. Topics of these calculations include quantum chemistry, molecular dynamics, crystallography, computational biology, astrophysics, physics, construction, and machine simulations.