Components are modular, self-contained units that can be reused in different systems to perform a specific function. A component can be an object, a piece of software, or a system. In software engineering, components are defined as independent modules with well-defined interfaces that can be integrated into a larger system.
In object-oriented programming, components are objects that can be used in multiple applications. In this context, a component is a building block that can be combined with other components to create more complex structures. Components can also be created as standalone objects that can be reused in different projects.
In the context of systems engineering, components are parts or subsystems that make up a larger system. In this context, components are usually physical elements such as sensors, actuators, and processors. A component can also be an abstract element such as a control algorithm or a data structure.