All Subprograms are available in both short (FORTRAN-77) and long name
versions (VAX FORTRAN) The VAX versions are identified by the facility
prefix ``UI_".
Note that all subprograms should be called as Integer Functions
where the function value is one of the error codes as described in Appendix C.
Errors will be automatically signalled unless explicitly
inhibited by the Application Program. For Application Programs running
solely on VAX systems, all Subprograms may be called as Subroutines, thereby
ignoring the Function Value.