Abstract: Some latest progresses in fuzzy PID control studies are briefly presented. Based on their control principles, various fuzzy PID controllers are classified to illustrate their inherent differences. The paper concentrates on four issues that are important in order to achieve widespread applications of fuzzy (PID) control. They are systematic design approaches, design with guaranteed performance, universal approximation capability and its quantitative measures, and fuzzy rule explosion. Each issue is discussed and, when needed, redefinition is introduced to better clarify the points on the issue. For instance, "rule explosion" can be reconsidered as "parameter efficiency." Finally, we summarize and provide the perspectives of the development of fuzzy control theory and techniques. We especially point out that simplicity should be fundamental to the design of intelligent controllers, including fuzzy controllers.