DOSBox
DOSBox is an emulator which creates a DOS-like environment primarily intended for running older, MS-DOS-based PC computer games which may not run properly on newer computers. DOSBox is open source. It is available for many operating systems, such as Linux, Microsoft Windows, Mac OS X, and BeOS. Since DOSBox is a full emulator, not just a compatibility layer like dosemu or the MS-DOS prompt of Microsoft Windows, it requires neither an x86 CPU nor a copy of MS-DOS or any other DOS to run, and unlike those it can run games that require the CPU to be in real mode.
