An "Open System" refers to a system that interacts with its environment by exchanging energy, matter, or information. This type of system is not isolated; it can receive inputs and produce outputs, allowing for continuous change and adaptation. Examples of open systems include ecosystems, organizations, and even the human body, which all rely on external resources to function effectively. In contrast to closed systems, which do not exchange matter with their surroundings, open systems are dynamic and often more complex. They are influenced by external factors, such as climate, market trends, or social interactions, making them essential for understanding processes in various fields, including biology, economics, and engineering.