Weapons
Energy Weapons
Defenses
Flight
Command
Thrusters
Hyperdrives
Crew
Quarters
Movement
Power
Storage
Factories
Utilities
Allows crew (and fire!) to travel between rooms.
Doors are used to allow Crew members to freely pass between different rooms and parts.
Though cheap to construct and seemingly beneficial in large numbers, care should be taken when placing doors as fire is able to easily pass through.