Final answer:
In 3D printing, CAD refers to Computer-Aided Design, essential for creating precise models. CADD stands for Computer-Aided Design and Drafting and is vital in fields such as architectural design, where it enables 3D visualizations and simulations, reducing the need for physical models.
Step-by-step explanation:
In 3D printing, the acronym CAD stands for Computer-Aided Design. CAD is an essential technology in 3D printing that allows designers and engineers to create precise models and representations of objects before they are printed. CADD, which expands to Computer-Aided Design and Drafting, is the practice of using computer software to represent the geometry of designed objects in two and three dimensions.
The invention of CAD software in 1961 revolutionized many fields including architectural design, allowing for realistic representations, improved speed, enhanced accuracy, and affordability in the creation of designs. With today's advanced CAD programs, architects and designers can create 3D visualizations and simulations, eliminating the need for physical models and facilitating virtual tours that provide exact views of the intended design.
For example, in the design of the Boeing 777 aircraft, a sophisticated CADD system enabled the design and assembly of the aircraft with such precision that mockups were largely unnecessary, and the first aircraft assembled could be flown immediately.