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| | Some Assembly Required |
 | | The Zarya module provided orientation control, communications and electrical power attached to the passive Node 1 for several months while the station awaited launch of the third component, a Russian-provided crew living quarters and early station core known as the service module or Zvezda. |
 | | The Zvezda service module is the first fully Russian contribution to the International Space Station, and it serves as the early cornerstone for the first human habitation of the station. |
 | | The Leonardo multipurpose logistics module, which was built by the Italian Space Agency (ASI), was the first of three such pressurized modules that serve as the International Space Station's "moving vans," carrying laboratory racks filled with equipment, experiments, and supplies to and from the station aboard the Space Shuttle. |
| aerospacescholars.jsc.nasa.gov /HAS/Cirr/ss/4/4.cfm (5177 words) |
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