In 1995, home users flocked to Windows 95 for Plug and Play, DirectX gaming, and the Start Menu. But businesses chose NT 3.51. It had a robust file system (NTFS) that supported file security and long filenames (something Win95 supported inconsistently via VFAT). The represents the "serious" choice—a system meant for engineers, developers, and financial institutions where a Blue Screen of Death meant lost money, not just a rebooted game of Doom.
: One of the first versions to display automatic text descriptions when hovering a mouse over toolbar buttons.
Windows NT 3.51 introduced several technical features that became the baseline for future enterprise environments: