: Introduced the TrueType font system , drag-and-drop functionality, and the Windows Registry .

While there is no official "Windows 3.1 APK" from Microsoft, you can still experience the nostalgia of 1992 on your Android device by using a DOS emulator. Since Windows 3.1 was an operating environment that ran on top of MS-DOS, it can be "installed" within an app to give you a fully functional desktop on your phone. How to Run Windows 3.1 on Android

: Versions like 3.1.3 and 3.1.4 were released around 2018 to bridge Android 4.4+ devices with the Windows Fall Creators Update.