Vintage 1994 Microsoft Windows NT Workstation Version 3.5 High-Density Disks 1-20 Operating SystemDisk 1-3 are open. All the other disks are still sealed in the plastic brand new. Comes with all original paperwork. SEE ALL PHOTOS!16-bit 32-bit 0894 Part No. 57731Windows NT 3.5 is a major release of the Windows NT operating system developed by Microsoft and oriented towards businesses. It was released on September 21, 1994, as the successor to Windows NT 3.1 and the predecessor to Windows NT 3.51.[3] One of the primary goals during Windows NT 3.5 development was to improve the operating system's performance. As a result, the project was codenamed "Daytona", after the Daytona International Speedway in Daytona Beach, Florida.[4]