Computer-aided design or computer-aided drawing, the use of a computer to create, modify, or analyze a design, typically in an engineering or architecture field.

​CAD

Additional view typically used to clarify off-axis features in an engineering drawing.

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​Auxiliary View

​You first design and model parts, then insert them into an assembly and use mates to position the parts. 

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Bottom-Up Modeling

​the focus is on the assembly, and the individual components are modeled around the entire assembly.

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Top-Down Modeling

an angled line that meets the endpoints of two straight 2D objects.

Chamfer