title: Is Fortran 2008 backwards compatible with previous Fortran versions?
body: <p>Yep I know.., this is not imagined ... it's a real Fortran question.</p>
  
  <p>By previous versions I mean Fortran 2003, 95, 90, and even 77.</p>
  
  <p>by backwards compatible I mean can easily run code written for previous versions in 2008 (with nothing more than some minor changes to syntax)?</p>