Below you will find a blend of Terry's and my cut at the B&W description. I tired to keep the first paragraph less than 200 characters per Joe's Instruction. What I do not know is how to get this description into a "category" and assume this has to be done by an administrator.
Black and White Photography is timeless, taking us back to the roots of photography. For the first 50 years of photography there were only monochrome representations of the world and therefore those images hold special significance.
Monochrome has been at the center of photography since the very beginning of both its art and science. The monochrome photographer does not jettison the color information; (s)he concentrates on the ways in which the tonal range of the image can be controlled to enhance the pleasure and understanding of the viewer. Monochrome can show emotion, texture, drama and contrast in a way color cannot. Line, shape and form gain more significance.
This category may be used for landscapes, nature, people, city and skyline using a continuum range of shades of gray from white to black. Removing color from a picture helps the viewer to focus on a subject's emotional state. Toned images such as sepia which can often yield richer, subtler shading than traditional black and white are welcome.