Microsoft Windows NT 4.0 was officially released on August 24, 1996, marking its 30th anniversary today. Codenamed “Tukwila,” it integrated the Windows Explorer desktop from Windows 95 with the NT operating system. Windows 95 was released a year earlier on August 24, 1995, and was initially codenamed “Chicago.” Windows NT 4 incorporated a modern user interface while maintaining the reliability of the NT kernel. It introduced features like the journaling NTFS filesystem but had limitations such as stability issues due to changes in the Graphics Device Interface (GDI) and lack of support for FAT32 and USB interfaces. Despite these shortcomings, NT 4 was a significant operating system that contributed to the competitive landscape of operating systems.