In telecommunications and computing, backward compatibility is a property of an operating system, software, real-world product, or technology that allows for interoperability with an older legacy system, or with input designed for such a system.
The first model of the Wii features backward compatibility with its predecessor, the GameCube, having the ability to run its discs and use its controllers and memory cards. Later versions of the system removed this feature.
An operating system (OS) is system software that manages computer hardware and software resources, and provides common services for computer programs.
An IBM System 360/65 Operator's Panel. OS/360 was used on most IBM mainframe computers beginning in 1966, including computers used by the Apollo program.
The first server for the World Wide Web ran on NeXTSTEP, based on BSD.