This chapter discusses DIGITAL Fortran standards conformance and language compatibility, and provides an overview of Fortran 90, Fortran 95, and High Performance Fortran features.
Fortran 90 is a superset that includes FORTRAN 77. Fortran 95 includes Fortran 90 and most features of FORTRAN 77. DIGITAL Fortran fully supports the FORTRAN 77 and Fortran 90 Standards, and supports many Fortran 95 features.