Analysis of information sources in references of the Wikipedia article "OSI model" in English language version.
Davies: Well, it was Hubert Zimmerman who really pushed that along, but there was one British man who I think invented the term 'open systems' actually, MacGregor or something like that. You probably won't hear of him because he's not a very forceful person, but he was involved a lot in the pressure to get OSI started. I think he invented the term 'open systems,' but Hubert Zimmerman was the real driving force.