When people ask "what is a PCB," "what does PCB stand for," or "what is a PCB board," they are normally referring to the flat board that mechanically supports and electrically links electronic parts. In box build assembly services , the PCB full form is printed circuit board, and in daily use, terms like PCB board, circuit board, PC board, and electronics PCB all factor to the very same core idea: a split board that transmits signals and power in between components such as resistors, capacitors, incorporated adapters, sensors, and circuits.