Bochs (pronounced "box") is an open source PC emulator that supports a wide variety of operating systems. The program, which was written by Kevin Lawton, is copyrighted by MandrakeSoft S.A. and distributed under the GNU Lesser General Public License.
Bochs can be used to run applications in a second operating system without having to use two different computers or a dual boot system. The emulator allows users to run Windows programs on a non-x86 or Unix machine and to run legacy applications or games on non-compatible computers. It is also useful for testing and debugging new operating systems.