This vintage OEM PC DOS Operating System version 6.1 comes with 5.25" floppy disks and is compatible with IBM, DOS, and PC DOS 6.1 operating systems. It is an authentic IBM product with an OEM license category, and comes with a typecase from 1992. The minimum system requirements are only 64 MB RAM, 50 MB of hard drive space, and a processor speed of 16 MHz. This version is perfect for those who want to use a classic operating system and experience the nostalgia of computing from the early 1990s. The package includes 20 devices, so you can install the operating system on multiple computers.