# B Additional Language Features

To facilitate compatibility with older versions of Fortran, Compaq Fortran provides the following additional language features:

- The DEFINE FILE statement (Section B.1)
- The ENCODE and DECODE statements (Section B.2)
- The FIND statement (Section B.3)
- FORTRAN-66 Interpretation of the EXTERNAL Statement (Section B.4)
- An alternative syntax for the PARAMETER statement (Section B.5)
- The VIRTUAL statement (Section B.6)
- An alternative syntax for octal and hexadecimal constants (Section B.7)
- An alternative syntax for a record specifier (Section B.8)
- An alternate syntax for the DELETE statement (Section B.9)
- An alternative form for namelist external records (Section B.10)
- The Compaq Fortran POINTER statement (Section B.11)
- Record structures (Section B.12)

These language features are particularly useful in porting older Fortran programs to Fortran 95/90. However, you should avoid using them in new programs on these systems, and in new programs for which portability to other Fortran 95/90 implementations is important.

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