What is Computer-aided design(CAD)?

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Computer-aided design (CAD) is the use of computers (or workstations) to aid in the creation, modification, analysis, or optimization of a design.[1] CAD software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturing.[2] CAD output is often in the form of electronic files for print, machining, or other manufacturing operations. The term CADD (for Computer Aided Design and Drafting) is also used.[3]
 The concept of designing geometric shapes for objects is very similar to CAD. It is called computer-aided geometric design (CAGD).
CAD is used as follows:
  1. To produce detailed engineering designs through 3-D and 2-D drawings of the physical components of manufactured products.
  2. To create conceptual design, product layout, strength and dynamic analysis of assembly and the manufacturing processes themselves.
  3. To prepare environmental impact reports, in which computer-aided designs are used in photographs to produce a rendering of the appearance when the new structures are built.
CAD systems exist today for all of the major computer platforms, including Windows, Linux, Unix and Mac OS X. The user interface generally centers around a computer mouse, but a pen and digitizing graphic tablet can also be used. View manipulation can be accomplished with a spacemouse (or spaceball). Some systems allow stereoscopic glasses for viewing 3-D models.
There are many cad software follows:
1. Tinkercad
2. Solidworks
3. AutoCad
4. FreeCAD
5. TurboCAD 2016 deluxe
6. Creo parametric 3D modeling software
7. IronCAD
8. Moment of inspiration
9. Shapr3D
10. Fusion 360 etc.
This tennis ball model is created by me on solidworks.
Example: 3D CAD model

                                                


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