This category lists operating systems (OSs) based on open source code. Open Source computer programs are those that include source code, and/or for which the source code is freely available, or made available without a fee or limited permissions.
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The FreeBSD Project FreeBSD is an advanced operating system for x86 compatible architectures. It is derived from BSD, the version of UNIX
FreeDOS It is complete, free, 100% MS-DOS compatible operating system with no enhancements or advanced features such as multitasking, protected mode operation, GUI.
