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How do CAD software packages differ from a painting program like Photoshop?

I'm working on a presentation about CAD. The teacher asked me to tell the class about how CAD software packages differ from a painting program like Photoshop. Please help me

Public Comments

1. CAD is 3d modeling. 100 % different from photoshop. Download blender a free CAD tool and see if its like photoshop. ( psss... its not! )