Interaction is a kind of action that occur as two or more objects have an effect upon one another. The idea of a two-way effect is essential in theconcept of interaction, as opposed to a one-way causal effect. A closely related term is interconnectivity, which deals with the interactions of interactions within systems: combinations of many simple interactions can lead to surprising emergent phenomena. Interaction has different tailored meanings in various sciences. Changes can also involve interaction.
Casual examples of interaction outside science include:
Communication of any sort, for example two or more people talking to each other, orcommunication among groups, organizations, nations or states: trade , migration, foreign relations, transportation,
The feedback during the operation of a machine such as a computeror tool , for example the interaction between a driver and the position of his or her car on the road : by steering the driver influences this position, by observation this information returns to the driver.