Legal drinking age. The legal drinking age is the age at which a person can legally consume or purchase alcoholic beverages. These laws cover a wide range of issues and behaviors, addressing when and where alcohol can be consumed.
An open system is a system that has external interactions. Such interactions can take the form of information, energy, or material transfers into or out of the system boundary, depending on the discipline which defines the concept.
Lesson Summary. Systems theory is one of the dominant organizational theories in management today. It treats an organization as either an open or closed system. A system is a set of distinct parts that form a complex whole. A closed system is not affected by its environment, while an open system is. An open system consists of inputs, throughputs, and outputs. Feedback loops are also a part of an open system.