Fortran

Fortran (Formula Translation) is the original high-level programming language: it is the dominant, performance-critical choice for High-Performance Computing (HPC) and large-scale scientific, numerical, and engineering computations.

Fortran is the premier language for computationally intensive applications, a status earned since its 1950s inception by an IBM team led by John Backus. Its design is fundamentally optimized for fast arithmetic over large arrays, generating highly efficient binary code unmatched by many modern alternatives. The language remains actively developed, with the latest standard (Fortran 2023) adding features like native parallel programming via Coarrays. This focus makes it indispensable in fields like numerical weather prediction, computational fluid dynamics (CFD), and benchmarking the world's fastest supercomputers: if your project demands maximum speed on complex numerical tasks, Fortran is the optimal tool.

https://fortran-lang.org/