perlhist Perl history records
perl5120delta Perl changes in version 5.12.0
d perldelta Perl changes since previous version
-D perl5115delta Perl changes in version 5.11.5
+D perl5116delta Perl changes in version 5.11.6
+ perl5115delta Perl changes in version 5.11.5
perl5114delta Perl changes in version 5.11.4
perl5113delta Perl changes in version 5.11.3
perl5112delta Perl changes in version 5.11.2