Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
CAD is a computational tool used by engineers to design and model components and systems, involving the integration of construction and technical problem-solving to achieve a desired outcome.
External reference — all senses of the word “cad” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.