Please note that Dec-10 Fortran (like all Digital Fortrans) had a huge number of extensions. When I worked at Middlesex Polytechnic (later Middlesex University)

Please note that Dec-10 Fortran (like all Digital Fortrans) had a huge number of extensions. When I worked at Middlesex Polytechnic (later Middlesex University), we replaced our Dec-10 with two IBM 4381 super-minis, and none of the Digital Fortran code that used them could easily be ported (my own programs were portable, because I adhered fairly rigidly to the Fortran-77 standard). I don't remember the Fortran 77 standard specifying STDERR, STOUT or STDIN in the sense the the C and C++ Standards do (in lower case) - but I might be a bit forgetful; this was over 30 years ago.