What platforms does it run on?

All Unix platforms. All Windows platforms (XP and later). Amiga, Atari, BeOS, Macintosh, MachTen, OS/2, RiscOS, VMS, IBM z/OS. For MS-DOS support has been removed with the latest releases of Vim. 16-bit DOS: latest supported version 7.1 32-bit DOS: latest supported version 7.3