What term is used to describe a system that enables communication between two or more entities, which can be either physical or software?

The term "Interface" refers to a system or point of interaction that facilitates communication between two or more entities, whether they are physical devices or software applications. In computing and networking contexts, an interface provides a defined boundary where different components can communicate effectively. For instance, a user interface allows users to interact with software, while an application programming interface (API) enables different software applications to exchange data and commands.

In hardware, an interface can also refer to the ports and connections that allow devices like printers or monitors to communicate with computers. By providing standards and protocols, interfaces ensure that different systems can work together, regardless of their underlying architecture or design. This critical role underscores the importance of interfaces in creating compatibility and facilitating communication across diverse systems and technologies.