Alien Traveler: a looong alien spaceship, possibly a mobile colony...
Space Carrier: these vehicles were used during the early decennies of the space colonization to transport freight between the orbital habitats.
Cargo Ship: a variation of the Space Carrier.
Refinery Vessel: descendant of the Interplanetary Space Carrier concept, this class refines its freight during the journey back home to reduce the delays of exploitation.
Space Tanker: another 'descendant' of the Interplanetary Space Carrier.
Low-Earth Orbit interceptor: descendant of the Stratofighter, its overall envergure has been reduced to make of the fighter a smaller target; the reinforced crew compartment also provides better protection for the pilot.