Insignia of the Enterprise NX-01, Starfleet's first Warp 5-capable starship




Insignia of the Columbia NX-02, second ship of the NX-class



Insignia of the M.A.C.O.s aboard the Enterprise, first assigned in 2153



Insignia of the NX Project, the ultimate fruit of which was the Warp 5-capable engines of the NX-class starships



Insignia of the Mirror Universe's I.S.S. Enterprise NX-01, flagship of the Terran Empire's Imperial Starfleet



Insignia of the Mirror Universe's I.S.S. Avenger NX-09, Admiral Black's flagship



Insignia of the Mirror Universe's M.A.C.O.s aboard the I.S.S. Enterprise