MenuetOS is an operating system with a monolithic preemptive, real-time kernel written in FASM assembly language. The system also includes video drivers. It runs on 64-bit and 32-bit x86 architecture computers. Its author is Ville M. Turjanmaa. It has a graphical desktop, games, and networking abilities (TCP/IP stack). One distinctive feature is that it fits on one 1.44 MB floppy disk. On an Intel Pentium MMX 200 MHz system, one person reported a boot time of "probably 5 seconds."
MenuetOS was originally written for 32-bit x86 architectures and released under the GPL-2.0-only license, thus many of its applications are distributed under the GPL.
The 64-bit MenuetOS, often referred to as Menuet 64, remains a platform for learning 64-bit assembly language programming. The 64-bit Menuet is distributed without charge for personal and educational use on