Fortran
In plain terms
One of the oldest languages, still dominant in heavy numerical computing.
Going deeper
Fortran was built for fast numerical and scientific computation and remains unmatched for certain array-heavy workloads. Decades of optimized libraries keep it alive.
Under the hood
Its array handling and mature compilers make it extremely fast for dense numerical code; legacy codebases run critical scientific infrastructure.
Examples
Weather forecasting, computational physics, BLAS/LAPACK libraries, HPC.
Think of it like...
Like a vintage industrial machine still outperforming newcomers at the one job it was forged for.