FreeDOS (formerly Free-DOS and PD-DOS) is a free operating system for IBM PC compatible computers. It intends to provide a complete DOS-compatible environment for running legacy software and supporting embedded systems.
License: Open Source
FreeDOS is a free and open-source DOS-compatible operating system ideal for running legacy applications with minimal system requirements, though it lacks modern features and a graphical user interface. In contrast, Windows 2000 provides a user-friendly experience with multitasking capabilities and robust networking support, but it comes with higher system requirements and is no longer officially supported.