The product is a vintage 1988 IBM Disk Operating System Version 4.00, designed for use with IBM OS/2 operating systems. It comes in its original sealed packaging, containing 3.5" diskettes for easy storage and transportation. This operating system is in English and requires a minimum of 4GB of RAM and less than 50 MB of hard drive space for installation. Made in the United States, this product is a piece of computer history that would be a valuable addition to any vintage computing enthusiast's collection.