When discussing fonts on a modern desktop system, fonts are usually scaled. This means that the font is stored as an algorithm which can be used to generate a bitmap of a chosen size. The algorithm can make allowances for the aspect ratio of the display device, whether the device is a screen or printer, and how much weight, or bolding, is required. The algorithm may also be capable of generating an antialised character, to make use of a display which can display a number of gray shades in between the black foreground, and white background.