> I am never sure what "replace" means when used in this context It means the use of assembly is replaced with the use of Fortran. At which it was very success

> I am never sure what "replace" means when used in this context It means the use of assembly is replaced with the use of Fortran. At which it was very successful in scientific computing. I don't believe it was ever meant to mean exterminate. Bear in mind that all programming was done in assembly or machine code prior to the introduction of Fortran. Since then a relatively tiny (though important) proportion of programmers program in assembly. That was the intent and it worked swimmingly. And only masochists program in machine code.