Ship symmetry and Gallente - Not understood.

Acolyte, Infiltrator, Praetor - Amarr, EM
Hornet, Vespa, Wasp - Caldari, Kinetic
Hobgoblin, Hammerhead, Ogre - Gallente, Thermal
Warrior, Valkyrie, Berserker - Minmatar, Explosive

NPC Info ( attack with ) ( defend against, primary / secondary )
Angel Cartel [ E ] E / K
Blood Raiders [ EM ] EM / T
EoM [ K ] K / T
Guristas [ K ] K
Mordu's Legion [ K ] K / T
Sansha's Nation [ EM ] EM / T
Serpentis [ K ] T / K
Amaar [ EM / T ] EM / T
Caldari [ K / T ] K / T
Gallente [ T ] K / T
Minmatar [ T ] E / K

Sensor Types
Minmatar - Ladar
Caldari - Gravimetric
Gallente - Magnetometric
Amarr - Radar

Gravimetric - Concentration of asteroids
Magnetometric - Ruins or abandoned areas
Radar - Communications facilities
Ladar - Harvestable gas clouds