Intel® Fortran Compiler 18.0 Developer Guide and Reference
The following are language extensions that facilitate compatibility with other versions of Fortran:
DEFINE FILE statement
FIND statement
The INTERFACE TO statement
FORTRAN 66 Interpretation of the EXTERNAL statement
An alternative syntax for the PARAMETER statement
VIRTUAL statement
AND, OR, XOR, IMAG, LSHIFT, RSHIFT intrinsics (see the A to Z Reference)
An alternative syntax for octal and hexadecimal constants
An alternative syntax for an I/O record specifier
An alternate syntax for the DELETE statement
An alternative form for namelist external records
The integer POINTER statement