Using computer and its graphics equipment to help designers design, referred to as CAD. In engineering and product design, computers can help designers undertake tasks such as calculation, information storage and drawing.

In design, computers are usually used to calculate, analyze and compare many different schemes to determine the best scheme; All kinds of design information, whether digital, literal or graphic, can be stored in the internal memory or external memory of the computer and can be quickly retrieved; Designers usually start with sketches, and the heavy work of turning sketches into working drawings can be handed over to computers. Computers can be used to process graphic data related to editing, enlarging, reducing, translating and rotating graphics.

Interactive technology:

In computer aided design, interactive technology is essential. Interactive cad system means that when users design with computer system, people and machines can exchange information in time. With the interactive system, people can conceive, sample and modify at the same time, and the display results of each step can be seen from the screen of the graphic terminal at any time, which is very intuitive.

The above contents refer to Baidu Encyclopedia -CAD.