The DCL MS-DOS 5.0 Operating System is a factory-sealed product that includes manuals and floppy discs, making it a comprehensive package for those looking to restore or upgrade their computer system. This operating system, by Microsoft, is designed for use with MS DOS 5.0 and requires a minimum of 512 MB of RAM, 66 MHz processor speed, and less than 50 MB of hard drive space. The 5.25-inch floppy disc format adds a touch of nostalgia to this classic piece of software history. Made in the USA, this operating system is a valuable addition to any collection or restoration project.