"Commercial Crew" refers to a program initiated by NASA to transport astronauts to and from the International Space Station (ISS) using privately developed spacecraft. This initiative aims to foster partnerships with commercial space companies, enhancing the capabilities of human spaceflight while reducing costs for the government. The program includes notable companies like SpaceX and Boeing, which have developed their own crewed spacecraft, Crew Dragon and CST-100 Starliner, respectively. By utilizing these commercial vehicles, NASA can focus on deeper space exploration while ensuring a reliable means of access to the ISS for scientific research and international collaboration.