PPTS (Prospective Piloted Transport System or Перспективная Пилотируемая Транспортная Система, Perspektivnaya Pilotiruemaya Transportnaya Sistema), unofficially called Rus, was a project by the Russian Federal Space Agency in 2006–2010 to potentially develop a new-generation, partially reusable piloted spacecraft.Its official name is Пилотируемый Транспортный Корабль Нового Поколения, Pilotiruemyi Transportny Korabl Novogo Pokoleniya or PTK NP meaning New Generation Piloted Transport Ship.