Hello World is an unofficial, free version of the classic 'Hello World' program. This version is capable of running on both Windows and Mac OS. It is based on the original 'Hello World' application for the Windows operating system, which can be found in the 'Windows' directory of the download. It is intended for educational purposes only.

This unofficial 'Hello World' application is free, which means that you will not be required to pay to download it. You will not be able to download this application unless you are on a supported operating system.

The program will run on your computer and will display a 'Hello World' greeting on your screen.