While Apple is busy putting the iPad into Mac OS X, someone got busy putting DOS into the iPad: Apple-approved iDOS will get you a
C:> prompt. Why? Here are some reasons: PC Tetris, Xenon 2 and freaking Wing Commander.
Those were the times. The times of manual management of 64KB upper memory blocks and
autobat/config.sys tuning. And Windows 3.0.
iDos is based on open-source emulator DOSbox and includes some built-in abandonware and freeware. You can install your own programs too, and it emulates keyboard, mouse and various video modes for $US0.99. It appears to be only available in the US right now. [iTunes via TouchArcade - Thanks ioburn!]