perlembed Perl ways to embed perl in your C or C++ application
perlapio Perl internal IO abstraction interface
+ perldebguts Perl debugging guts and tips
perlxs Perl XS application programming interface
perlxstut Perl XS tutorial
perlguts Perl internal functions for those doing extensions
perlcygwin Perl notes for Cygwin
perldos Perl notes for DOS
perlhpux Perl notes for HP-UX
+ perlmachten Perl notes for Power MachTen
perlos2 Perl notes for OS/2
perlos390 Perl notes for OS/390
perlvms Perl notes for VMS