A is for the Atavachron, the sophisticated time portal and computer system of the late planet Sarpeidon. B is for Bussard Collectors C is for Captain's Yacht, a private, warp-capable pleasure and luxury craft attached to some Federation starships in the late 24th century. D is for Dunsel. E is for Energy Shielding, commonplace on what seems like most of the known galaxy's larger spaceships. F is for Food Replicators G is for Graviton emitters H is for Hypospray I is for Inaprovaline, an advanced medication in use during the 23rd and 24th centuries. J is for Jefferies Tube, they're not your grandfather's access tunnel.