Computer-aided design

Computer-aided design (CAD) is the use of computer technology to aid in the design and especially the drafting of a part or product. It is both a visual (or drawing) and symbol-based method of communications whose conventions are particular to a specific technical field.
Drafting can be done in 2d and 3d.
Drafting is the integral communications of technical drawings and is the Industrial arts sub-discipline which underlies all involved technical endeavors. In representing complex, three-dimensional objects in two-dimensional drawings, these objects have traditionally been represented by three projected views at right angles.
Current CAD software packages range from 2D vector base drafting systems to 3D solid and surface modellers. Modern CAD packages can also frequently allow rotations in three dimensions, allowing viewing of a designed object from any desired angle, even from the inside looking out. Some CAD software is capable of dynamic mathematic modeling, in which case it may be marketed as CADD — Computer Aided Design and Drafting.