Perl is an excellent programming language that's commonly used for setting up CGI scripts and various kinds of web-based apps. Among its main pros is that it supports modules - ready-made batches of program code that are used to execute multiple tasks and to enhance the performance of a given script without slowing it with unneeded lines of program code. To put it simply, in the event that five processess should be performed, you're able to use five lines of code to call each one of the modules rather than adding hundreds of lines used to create the actual modules within your script. Perl is really handy and it can be used for multiple purposes, that's why a wide range of corporations have integrated it in their web products or on their resource-demanding websites - cPanel, IMDB, Craigslist, BugZilla, BBC and many more. It is commonly used in addition to other programming languages like PHP or Python.