Arbitrary multidimensional arrays for list [] and hash {} sectors |
Modules allow convenient library structure |
Functional but slightly adhoc object-oriented class structure hacked onto existing Perl4 |
C/C++ can be called from Perl and vice versa |
tie/untie allow more general database interfaces |
AUTOLOAD allows arbitrary action for undefined subroutines |
Now subroutines can be predeclared before implementation |