Computer Aided Design (CAD)
In 1963, the Massachusetts Institute of Technology [MIT] demonstrated a computer system called sketch pad that created and displayed graphic information on a cathode ray tube (CRT) screen. This system soon became known as CAD. CAD is a television like system that produces a picture on the CRT screen from a computer. Most CAD system consists of a desktop computer which is connected to the main computer. The addition of a keyboard, light pen or an electronic tablet and plotter enables the operator to produce any drawing or view required.
Advantages of CAD:-
1. Greater productivity of drafting personnel
2. Less drawing production.
3. Better drawing and design accuracy.
4. Better drawing appearance.
5. Greater detail in layout.