The Microsoft NT Workstation Upgrade Version 4.0 CD-ROM is a vintage operating system from Microsoft, specifically designed for English language users. This product provides an upgrade version of the Microsoft NT operating system on a CD format, allowing users to install or upgrade their current system with the original disc. With its focus on providing a reliable and efficient operating system, this product is a valuable addition to any computer or networking collection.

*** COLLECTIBLE WINDOWS NT 4.0 upgrade with sleeve key is on the back of the sleeve this is sold as a collectible item ***