The following are BANNED

ASSIGN
ENTRY
STOP
PAUSE
RETURN  - except at the beginning of a subroutine in the statement

                IF (STATUS.NE.SAI__OK) RETURN

Logical IF -  except in the above case
Arithmetic IF
Assigned GOTO
DIMENSION
EQUIVALENCE - should be avoided if at all possible.

Particularly avoid:

• EQUIVALENCEing a variable in a common block
• Using EQUIVALENCE on items of different data type