A category of fine art, graphic art covers a broad range of visual artistic expression, typically two-dimensional, i.e. produced on a flat surface. The term usually refers to the arts that rely more on line or tone than on colour, especially drawing and the various forms of engraving; it is sometimes understood to refer specifically to printmaking processes, such as line engraving, aquatint, drypoint, etching, mezzotint, monotype, lithography, and screen printing (silk-screen, serigraphy). Graphic art further includes calligraphy, photography, painting, typography, computer graphics, and bindery. It also encompasses drawn plans and layouts for interior and architectural designs.