Computer Aided Design

Computer-aided design (CAD) also known as computer-aided design and drafting (CADD) is the use of computer technology for the process of design and design-documentation. Computer-aided design (CAD) involves creating computer models defined by geometrical parameters. These models typically appear on a computer monitor as a three-dimensional representation of a part or a system of parts, which can be readily altered by changing relevant parameters. CAD systems enable designers to view objects under a wide variety of representations and to test these objects by simulating real-world conditions.
A CAD system is a combination of hardware and software that enables engineers and architects to design everything from furniture to airplanes. In addition to the software, CAD systems require a high-quality graphics monitor; a mouse, light pen, or digitizing tablet for drawing; and a special printer or plotter for printing design specifications.
CAD systems allow an engineer to view a design from any angle with the push of a button and to zoom in or out for close-ups and long-distance views. In addition, the computer keeps track of design dependencies so that when the engineer changes one value, all other values that depend on it are automatically changed accordingly.
CAD is a type of software used for creating blueprints and schematics. CAD software is used in construction, engineering and other industries that use technical illustrations. CAD programs produce designs in 2-D, 3-D, or both, depending on the specific software. Many companies make CAD software-which ranges from open-source to extensive commercial packages-and its use provides several benefits.

There is the variety of use the computer aided design (CAD) includes, the design of goods used by consumers or other products, design of tools and machinery, building floor plans and for the detailed engineering designs. CAD is also widely used to produce computer animation for special effects in movies, advertising