The Stranger turned and led along the gangway, which led to an elevator, which shot up a thousand stories or more in just milliseconds. The elevator doors opened on a gleaming yellow room filled with row upon row of dataterms and dataterm operators extending off into infinity. "The Central Communications Node," said the Stranger. The elevator shot up another thousand stories. The doors opened on another room filled with rows of dataterms and operators, all orange. "The Central Management Information Node," said the Stranger. The elevator shot up further. Another room, this one red. "The Central Security Node."