Thanks to a clever developer DOSBox, a DOS emualtor, has been ported to S60. This could potentially give you access to an essential applications from the past as well as a variety of games such as Tank Wars or Prince of Persia. Less usefully, given the speeds involved, it also means is now possible to run Windows 3.1 (and possibly Windows 95 too) on your phone.

We have heard many times that today's smartphones have the equivalent processing power and resources of standard desktop PC's from the early 90's, but it's not often you see this illustrated in such an obvious way. It's even more impressive when you consider this is all running in an emulated system on top of the Symbian OS.

Image credit: isaacw on VOGONS

The best place to start is the VOGONS forum, where the developer has been detailing the on going development of the port. There's also an active community discussing what you can do with the emulator.

There is also a thread in this forum showing how DOSBox can be used to run Windows 3.1 on an N95.

Image credit: fwrnando's blog

Here's a video, from YouTube, showing DOSBox, running on an E51, being used to play Commander Keen.