Computer-aided design (CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design. This software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturing. Designs made through CAD software are helpful in protecting products and inventions when used in patent applications. CAD output is often in the form of electronic files for print, machining, or other manufacturing operations. The terms computer-aided drafting (CAD) and computer aided design and drafting (CADD) is also used.
Its use in designing electronic systems is known as electronic design automation (EDA). In mechanical design it is known as mechanical design automation (MDA), which includes the process of creating a technical drawing with the use of computer software.
CAD software for mechanical design uses either vector-based graphics to depict the objects of traditional drafting, or may also produce raster graphics showing the overall appearance of designed objects. However, it involves more than just shapes. As in the manual drafting of technical and engineering drawings, the output of CAD must convey information, such as materials, processes, dimensions, and tolerances, according to application-specific conventions.
CAD may be used to design curves and figures in two-dimensional (2D) space; or curves, surfaces, and solids in three-dimensional (3D) space.: 71, 106
CAD is an important industrial art extensively used in many applications, including automotive, shipbuilding, and aerospace industries, industrial and architectural design, prosthetics, and many more. CAD is also widely used to produce computer animation for special effects in movies, advertising and technical manuals, often called DCC digital content creation. The modern ubiquity and power of computers means that even perfume bottles and shampoo dispensers are designed using techniques unheard of by engineers of the 1960s. Because of its enormous economic importance, CAD has been a major driving force for research in computational geometry, computer graphics (both hardware and software), and discrete differential geometry.
The design of geometric models for object shapes, in particular, is occasionally called computer-aided geometric design (CAGD).
Buxton is a spa town in Derbyshire, in the East Midlands region of England. It has the highest elevation – about 1,000 feet (300 m) above sea level – of any market town in England.[nb 1] Close to the county boundary with Cheshire to the west and Staffordshire to the south, Buxton is described as "the gateway to the Peak District National Park". A municipal borough until 1974, Buxton was then merged with other localities lying primarily to the north, including Glossop, to form the local government district and borough of High Peak within the county of Derbyshire. It is also near to Greater Manchester. The population of the town was 22,115 at the 2011 Census.
Buxton landmarks include Poole's Cavern, an extensive limestone cavern open to the public, and St Ann's Well, fed by the geothermal spring bottled and sold internationally by Buxton Mineral Water Company. Also in the town is the Buxton Opera House, which hosts several music and theatre festivals each year. The Devonshire Campus of the University of Derby is housed in one of the town's historic buildings.
Buxton is twinned with two towns: Oignies in France and Bad Nauheim in Germany.