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.