Definition - What does FreeDOS mean?
FreeDOS is a free and open-source operating system that is designed to provide a DOS-compatible environment. It was initially developed for IBM PCs and supports running legacy software, games and build embedded systems.
FreeDOS was released in 1998 and is also known as PD-DOS.
Techopedia explains FreeDOS
FreeDOS was primarily designed to provide a DOS environment similar to MS-DOS. It can run all the applications and commands that are supported by MS-DOS. FreeDOS has the ability to provide multiboot on Windows NT and 9X OSs and supports FAT32 and large disk support with long file names and more. Its distribution comes as full-kernel software, applications, networking, development and other features. All of the pre-installed and available software for FreeDOS is also under the GNU free license.