The industrial evidence shows that a classical PID controller is the most popular controller due to its simplicity of operation and low cost. It has been realized that classical PID controllers are effective for linear systems but not suitable for nonlinear and complex systems. Scientists and researchers use fuzzy logic to enhance them due to its ability to translate the operator’s control action into the rule base. This paper presents a survey of classical and fuzzy PID controllers. Here, an attempt is made to present the history of the development of classical PID controllers and their enhancement using fuzzy logic theory.