The product is a new, sealed copy of the Microsoft Windows Operating System version 3.1. This authentic NOS (New Old Stock) item is in English and is designed for use with Microsoft Windows 3.x and 3.1 operating systems. It comes in a 3.5" floppy format and includes a standard license category for activation on a single device. Made in the United States, this product is ideal for those looking to restore or upgrade their computer's operating system to a classic and reliable version from Microsoft.