interface

(1) A shared boundary defined by common physical interconnection characteristics, signal characteristics, and meanings of interchanged signals. (2) A device or equipment making possible interoperation between two systems, e.g., a hardware component or a common storage register. (3) A shared logical boundary between two software components. (4) A common boundary or connection between persons, or between systems, or between persons and systems.

For data communication, a hardware and software link that connects two computer systems, or a computer and its peripherals.

A Java keyword used to define a collection of method definitions and constant values. It can later be implemented by classes that define this interface with the "implements" keyword.

The services a piece of code promises to provide forever, in contrast to its "implementation", which it should feel free to change whenever it likes.

A device or program that permits one part of a computer system to work with another