gDOSBox is an Android version of the well known DOSbox 0.74 implementation, with the key difference being it resolves some of the issues with the mathematical routines that can cause problems in high-precision calculations.
gDOSBox is experimental. But it provides a straightforward way to run DOS programs on an Android device. Many original DOS-based programs evolved from still earlier systems and facilities that had undergone significant development, and address a wide range of requirements. It is interesting and educational to be able to operate these older programs on a small tablet device.