Acronym for Computer Aided Design.
A CAD is a combination of hardware software that enables engineers and architects to design. It is the main geometry authoring tool within the Product Lifecycle Management process and involves both software and sometimes special-purpose hardware. Current packages range from 2D vector based drafting systems to 3D solid and surface modelers. Computer Aided Design allows you to produce diverse consumer products efficiently and effectively. You can obtain a degree from one of many accredited universities, colleges, or technical schools. You will take classes in design, computers, art, drafting, engineering, and architecture.
So, if you would like to combine your design experience with a high-tech career like Architectural Drafting or Mechanical Drafting, then you should explore your options in Computer-Aided Design.
CAD is not a product. There are a number of products available which supports CAD. But the basic CAD softwares that are used world-wide are Microstation & AutoCAD. Microstation is a product of Bentley & AutoCAD is of Autodesk.