The AWS is a special free version of web server for all Web Developers and Web Designers and is based on Apache WebServer, PHP and MySQL.
It offers to user the option of executing different versions of PHP and MySQL.
It is structured for easy upgrading of individual programs without uninstalling - reinstalling the AWS, no redefine needed of configuration of each application.
Each new version of the AWS, includes the latest versions of individual programs without repealing earlier versions. So, you have the opportunity for experiments, to make sure that your web pages works on all versions.
Multiple PHP Versions (5.2 - 5.3 - 5.4)
Multiple MySQL Versions (5.1 - 5.5)