The interaction and simultaneous functioning of multiple products having multiple architectures etc(noun)
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Use "interoperation" in a sentence
"I think you could call THE FOUNTAIN as a whole an ambiguous movie, because I think Darren Arronofksy said its up for interoperation."
"This, along with finer global interoperation and safer financial services for citizens, are all fundamental components of Capitalism 2.0."
"We acquired the startup Android in 2005 and set about the ambitious goal of creating a new mobile operating system that would allow open interoperation across carriers and manufacturers."