1.microsoft / MS-DOSArchivedThe original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposesms-dosAssemblyMIT32K total4.7K forks+364 starsfrom 31,894 · score 5.90
2.icebreaker / floppybirdFloppy Bird (OS)qemuassemblygamedosbootos+5 moreAssemblyMIT935 total62 forks+3 starsfrom 932 · score 1.39