perldoc Look up Perl documentation in Pod format
perlhist Perl history records
-D perl5130delta Perl changes in version 5.13.0
+D perl5131delta Perl changes in version 5.13.1
+ perl5130delta Perl changes in version 5.13.0
perl5120delta Perl changes in version 5.12.0
d perldelta Perl changes since previous version
perl5115delta Perl changes in version 5.11.5