MenuetOS is an operating system with a monolithic preemptive, real-time kernel, including video drivers, all written in FASM assembly language, for 64-bit and 32-bit x86 architecture computers, by Ville M. Turjanmaa. It has a graphical desktop, games, and networking abilities (TCP/IP stack), yet it still fits on one  floppy disk. On an Intel Pentium MMX  it can boot in .