The product is a factory sealed Microsoft Windows NT Workstation for a Compaq PC. This operating system is in CD format, specifically designed for Microsoft Windows NT and Windows 95. The package includes an English language version and has dimensions of 8 inches in length, 5.5 inches in width, and 0.25 inches in height. This product provides a reliable and authentic software experience for users of Compaq PCs looking to install Microsoft Windows NT or 95 operating systems.