Similar to Salyut or Skylab, consists of a simple cylinder or box which acts as the living quarters. Will have a single docking port, solar panels and possible other simple accessories. Such stations are generally impractical for use as anything other than a show of capability, or for simple science experiments.

Similar to Mir or the ISS, consists of several modules connected together into a larger structure. Rarely large enough to support more than a dozen people, can be used for science experiments or as a monitoring station.

In some cases, it may be extended to act as a relay station, being able to store fuel and/or food supplies for ships to refuel before heading out of orbit.