1. Computer-aided design, or CAD, used to  take basic geometric shapes and manipulate them into a specific design. CAD applications are computer-driven, allowing designers to collaborate from anywhere in the world via the Internet. CAD applications also minimize the  need for the teams of onsite drafters that were formerly used to create designs for industry.
   
   2. AutoCAD :-
   It is CAD application that was developed by Auto desk, in 1982, it is used to aid programmers in all aspects of 2Dimension and 3D design. current time company has over 100 different products that address all phases of design, including manufacturing, infrastructure and building. it is not only used in industry, but in the entertainment and advertising world to create visual 3D effects.

Dear Aspirant CAD (Computer Aided Design) is the use of computers for designing models of physical products which mean computers. On the other hand, AID (Artificial Intelligence and Data Science) is a new branch of study which deals with scientific methodologies, processes, and techniques drawn from different domains like statistics, cognitive science, etc. I hope you are clear now. If you have any other doubts feel free to ask. All The Best!!!