Queue     Element      Queues
        ———————————————————————————-  —————————————

  Print      | PrintQueue   | PrintElem    |  ForProcessingQueue

  Inhibit     | InhibitQueue  | InhibitElem    |  ToGrapevineQueue

  Uninhibit    | UninhibitQueue | UninhibitElem   |  ToArpanetQueues

  Requeue    |      | Requeue    |  BadItemQueue

  DequeueAndDestroy |      | DequeueAndDestroy|  <ArpaHostName>

  ReturnToSender  |      | ReturnToSender  |

  BreakLock    | BreakQueueLock |       |
        ———————————————————————————-