He assists Colonel White in the execution of Spectrum assignments by accessing data and radio links from a large supercomputer, which he operates from a moveable chair. At White's command, Green can activate the control room's display screen or speak on the base's public address system.
Colonel White relies on Green to access data and radio communications from a powerful computer while operating it from a movable chair. He can then execute commands by activating the control room's display or speaking over the base's public address system, as directed by White.