Supercomputers are machines with a computing capacity far greater than ordinary computers. They are measured in Petaflops (PFlops) and their potential far exceeds any desktop computer.The 5 most powerful supercomputers:Frontier (United States): 1,194 PFlops (HPE Cray OS)Aurora (United States): 585.34 PFlops (SUSE Linux Enterprise Server)Eagle (United States): 561.20 PFlops (Ubuntu 22.04)Fugaku (Japan): 442.01 PFlops (Linux Red Hat Enterprise)LUMI (Finland): 379.70 PFlops (HPE Cray OS)Interesting facts:All the supercomputers on the list use a Linux operating system.The reasons for this are: open source code, lower resource consumption, and modular structure.Linux implementation is free for developers.North America leads with 171 supercomputers, followed by Asia (169) and Europe (143).Spain has the MareNostrum 5 (8th in the ranking), with 138.20 PFlops (Red Hat 9.1).Applications of the MareNostrum 5:Climate change research.Gravitational wave study.Other research areas.Conclusion:Supercomputers are essential tools for scientific and technological advancement. Their power allows them to perform complex simulations and calculations that would be impossible on ordinary computers.