J
- Jihad, Butlerian – Mankind's "crusade against computers, thinking machines, and conscious robots."
- Judge of the Change – "An official appointed by the Landsraad High Council and the Emperor to monitor a change of fief, a kanly negotiation, or formal battle in a War of Assassins. The Judge's arbitral authority may be challenged only before the High Council with the Emperor present."
Read more about this topic: Glossary Of Dune Terminology