Propellant management is the systematic study and engineering practice concerned with the comprehensive handling, storage, conditioning, transfer, and precise control of propellants within propulsion systems, particularly in aerospace applications. This academic field investigates the complex physical and chemical behaviors of propellants under various environmental conditions (including microgravity and variable acceleration), the fluid dynamics within storage and transfer systems, and the design and operation of associated hardware (tanks, pumps, valves, lines, sensors) to ensure optimal performance, reliability, and safety. Key characteristics include its multidisciplinary nature, integrating principles from thermodynamics, fluid mechanics, materials science, and control systems, and its critical significance lies in enabling efficient engine operation, maximizing mission duration, ensuring vehicle stability and control, and facilitating complex maneuvers essential for space missions.