The product is a set of three 3.5" floppy disks containing the Microsoft MS-DOS 6.22 operating system. The disks are formatted for English language use and have a minimum hard drive space requirement of less than 50 MB. This product is designed for installation on a single device and is compatible with Microsoft DOS operating systems. Made by Microsoft in the United States, these floppy disks provide a standard license category for users looking to install or upgrade to DOS 6.2 on their computer.