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. 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. Throughout history, technological inventions have shaped the development of graphic art. In 2500 BC, the Egyptians used graphic symbols to communicate their thoughts in a written form known as hieroglyphics. The Egyptians wrote and illustrated narratives on rolls of papyrus to share the stories and art with others. During the Middle Ages, scribes manually copied each individual page of manuscripts to maintain their sacred teachings. The scribes would leave marked sections of the page available for artists to insert drawings and decorations. Using art alongside the carefully lettered text enhanced the religious reading experience. Johannes Gutenberg invented an improved movable type mechanical device known as the printing press in 1450, the first outside of Asia. His printing press facilitated the mass-production of text and graphic art and eventually, replaced manual transcriptions altogether. Again during the Renaissance years, graphic art in the form of printing played a major role in the spread of classical learning in Europe. Within these manuscripts, book designers focused heavily on typeface. Due to the development of larger fonts during the Industrial Revolution, posters became a popular form of graphic art used to communicate the latest information as well as to advertise the latest products and services. The invention and popularity of film and television changed graphic art through the additional aspect of motion as advertising agencies attempted to use kinetics to their advantage. The next major change in graphic arts came when the personal computer was invented in the twentieth century. Powerful computer software enables artists to manipulate images in a much faster and simpler way than the skills of board artists prior to the 1990s. With quick calculations, computers easily recolor, scale, rotate, and rearrange images if the programs are known.