dispatcher

noun4

1. •
   Agent noun of dispatch; one who dispatches.
2. •
   In a transportation organization, a person who controls the movements of vehicles.
3. •
   A piece of software responsible for assigning priorities and resources to tasks waiting to be scheduled.
4. •
   (slang) Any die used for cheating, whether fraudulently weighted or bearing duplicate numbers.

   • First see that each die has all six figures upon it, for some dice are dispatchers, made with double numbers, […] — 1897