Two months ago, a DOS emulator for iOS devices called iDOS from FastIntelligence appeared in the App Store that allowed users to run old PC DOS applications -- including Windows 3.1 itself -- under emulation. The free app was pulled after only a day, most likely for being in violation of App Store policies that forbid running external code. DOS applications were loaded via iTunes File Sharing, and commands were entered via a prompt and the virtual keyboard within the app.
