UnoDOS is a family of graphical operating systems spanning from 16-bit real-mode DOS on a 1.44 MB floppy to pc64, a modern 64-bit bare-metal OS for contemporary PCs. It features a unified codebase across twenty-two platforms including home computers, consoles, and handhelds, with a complete application suite including office tools, browser, IDE, and multimedia apps all written natively in x86 assembly and C.