Although computers have made tremendous strides over the last few decades in terms of their hardware, especially the processor speeds and sophistication, some things have not changed nearly as much. The most important thing that is still the same now as twenty years ago is the constraint of the WIMP interface used in human-computer interaction. WIMP is an acronym denoting window, icon, menu, and pointing device, and is used to describe the sort of interface that has been common for quite some time now. A human user typically interacts with the computer through a screen, a keyboard, and a mouse. The screen is the most important, or often the only, means for the computer to communicate its output. The screen typically consists of one or more windows, each of which may be used for separate files or other environments; the screen also...