system [Neurosurgery Wiki]

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A **system** is a set of interrelated or interacting elements organized to achieve one or more objectives. Systems can be found in many contexts—natural, technical, social, or conceptual. Key features of a system typically include:

* **Components**: The individual parts or elements.
* **Relationships**: How the components are connected or interact.
* **Boundary**: The limits that separate the system from its environment.
* **Input and Output**: Energy, information, or material that enters (input) or leaves (output) the system.
* **Purpose or Function**: The reason the system exists or what it is intended to do.
* **Feedback**: Information used to adjust or control the system’s behavior.

### Examples:

* **Biological system**: The human nervous system.
* **Technical system**: A computer operating system.
* **Social system**: An educational system.
* **Ecological system**: A rainforest ecosystem.