There may be a few system dependent issues
of concern to EBCDIC Perl programmers.
-=head2 OS/400
-
-The PASE environment.
+=head2 OS/400
=over 8
+=item PASE
+
+The PASE environment is runtime environment for OS/400 that can run
+executables built for PowerPC AIX in OS/400, see L<perlos400>. PASE
+is ASCII-based, not EBCDIC-based as the ILE.
+
=item IFS access
XXX.