I\'ve been working with a lot of FORTRAN 77 lately, and though I had reservations at first, I now see some great qualities of the language. It is:
Or is the answer Fortran 90, 95, 2003 . . . ?
Yes. Fortran 95 supported by most compilers is the language you are looking for. However Fortran 2003 has some major enhancements (besides unnecessary from your point of view support of OOP) which might be useful. Compiler Support for the Fortran 2003 Standard.