<P> In 1954 , language FORTRAN was invented at IBM by a team led by John Backus ; it was the first widely used high level general purpose programming language to have a functional implementation , as opposed to just a design on paper . It is still a popular language for high - performance computing and is used for programs that benchmark and rank the world 's fastest supercomputers . </P>
where was the first high level language operating system created
at IBM