Drawings in the context of "Blackboard"

Graphics (from Ancient Greek γραφικός (التصميم) 'pertaining to drawing, painting, writing, etc.') are visual images or designs on some surface, such as a wall, canvas, screen, paper, or stone, to inform, illustrate, or entertain. In contemporary usage, it includes a pictorial representation of data, as in design and manufacture, in typesetting and the graphic arts, and in educational and recreational software. Images that are generated by a computer are called computer graphics.

Examples are photographs, drawings, line art, mathematical graphs, line graphs, charts, diagrams, typography, numbers, symbols, geometric designs, maps, engineering drawings, or other images. Graphics often combine text, illustration, and color. Graphic design may consist of the deliberate selection, creation, or arrangement of typography alone, as in a brochure, flyer, poster, web site, or book without any other element. The objective can be clarity or effective communication, association with other cultural elements, or merely the creation of a distinctive style.

Master of the Housebook and Master of the Amsterdam Cabinet are two names used for an engraver and painter working in South Germany in the last quarter of the 15th century. He is apparently the first artist to use drypoint, a form of engraving, for all of his prints (other than woodcuts he may have designed). The first name derives from his book of drawings with watercolour, called the Medieval Housebook, which belonged to the German noble family of Waldburg-Wolfegg from the 17th century until 2008, when they were reported to have sold it for €20 million to a Swiss buyer; however, the legality of its sale for export has been challenged and, for the moment, it remains with the family. In 1999, the book was lent to the National Gallery of Art in Washington, D.C., for an exhibition. The majority of his surviving prints are in the print room at the Rijksmuseum in Amsterdam, hence his second name. Most, but not all, art historians still agree that the Housebook and the prints are by the same artist.

Sydney sandstone, also known as the Hawkesbury sandstone, yellowblock, and yellow gold, is a sedimentary rock named after Sydney, and the Hawkesbury River north of Sydney, where this sandstone is particularly common. Sydney sandstone was deposited in the Triassic Period probably in a freshwater delta and is the caprock which controls the erosion and scarp retreat of the Illawarra escarpment.

The Hawkesbury sandstone forms the bedrock for much of the region of Sydney, Australia. Well known for its durable quality, it is the reason many Aboriginal rock carvings and drawings in the area still exist. As a highly favoured building material, especially preferred during the city's early years—from the late 1790s to the 1890s—its use, particularly in public buildings, gives the city its distinctive appearance. The sandstone has traditionally been interpreted as the product of a large braided river system, comparable in scale and depositional style to the modern Brahmaputra River in Bangladesh.