PERL

Much of the growth in Perl as a platform has come by way of the increasing use of libraries (Perl 4) and modules (Perl 5). These are mechanisms that enable
developers to write self-contained portions of Perl code that can be slotted in to a Perl application.

These add-ons range from fairly high-level utilities such as a module that adds HTML tags to text, to low-level, down-and-dirty development tools such as code
profilers and debuggers.

The ability to use extensions like these is a remarkable advance in the development of a fairly slick language and it has helped to fuel the growth in Perl use. It
makes it easy for Perl developers to share their work with others; the arrival of objects in Perl 5 makes structured design methodologies possible for Perl
applications. The language has come of age without losing any of its flexibility or raw power.