The ability of a system, application or program to operate with another, even if they do not natively "speak the same language". Successful InterOperability is commonly based on StandardsCompliant communication.
In the Linux world, InterOperability normally refers to the ability for Linux users to interact with non-Linux (most commonly MicrosoftWindows and MacOSX) users. See 
Category:Interoperability for our pages on this topic.
One page links to InterOperability:
