Peter Shenkin wrote: > I've worked on not only VMS, but also CMS. If you want > your code to issue system calls in these, and UNIX, too, > you have to have some sort of conditional compilation > mechanism. Ah, but that's a different question - yes, you have to conditionalize calls to interfaces of different OS's - but that's true in any language, unless you have a compatibility layer. Now, surely, you can have a Unix layer on almost anything (Cygwin is a popular one on Microsoft Windows OS's). -- Toon Moene - mailto:[log in to unmask] - phoneto: +31 346 214290 Saturnushof 14, 3738 XG Maartensdijk, The Netherlands Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html GNU Fortran 95: http://gcc.gnu.org/fortran/ (under construction)