Automatic control is a science that deals with the modeling, analysis, identification, and control of dynamic systems. Its theoretical foundations include mathematics, signal theory, and theoretical computer science. Automatic control allows for controlling a system while adhering to a set of specifications (speed, precision, stability, etc.)." (Wikipedia) 

Electronics is a branch of applied physics that 'deals with electrical conduction phenomena and associated equipment.' It addresses 'the movement of charge carriers in vacuum, gases, and semiconductors, the resulting electrical conduction phenomena, and their applications.'" (Wikipedia) 

"Electrical engineering pertains to 'the practical applications of electricity, the science that studies these applications.' It encompasses, for example, the production, transportation, distribution, treatment, transformation, management, and utilization of electrical energy." (Wikipedia)