Black And White Photography

Some modern film directors will occasionally shoot movies in black and white as an artistic choice, though it is much less common for a major Hollywood production. This is also true of black-and-white photography, where many photographers choose to shoot in solely black and white since the stark contrasts enhance the subject matter. For example, the movie π is filmed in entirely black and white, with a grainy effect until the end.
Computing
Most computers had monochrome (black-and-white, black and green, or black and amber) screens until the late 1980s; however, some home computers could be connected to television screens to eliminate the extra cost of a monitor. These took advantage of NTSC or PAL encoding to offer a range of colors from as low as 4 (IBM CGA) to 128 (Atari 800) to 4096 (Commodore Amiga). Early videogame consoles such as the Atari Video Computer System/VCS/2600 supported both black-and-white and color modes via a switch, as did some of the early home computers; this was to accommodate black-and-white TV sets which would display a color signal poorly. (Typically a different shading scheme would be used for the display in the black-and-white mode.)