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The Apollo program used four types of launch vehicles:

Little Joe II - unmanned suborbital launch escape system development.Saturn I - unmanned suborbital and orbital hardware development.Saturn IB - preparatory unmanned missions, and Apollo 7, the first manned (Earth orbit) mission.Saturn V - unmanned and manned earth orbit and lunar missions.

The Marshall Space Flight Center, which designed the Saturn rockets, referred to the flights as Saturn-Apollo (SA), while Kennedy Space Center referred to the flights as Apollo-Saturn (AS). This is why the unmanned Saturn 1 flights are referred to as SA and the unmanned Saturn 1B are referred to as AS. Dates given below are dates of launch.

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