The term 'Lunar Craft' refers to the spacecrafts that were used in the Apollo program of the 1960s and 1970s. The acronym LEM stands for Lunar Excursion MODULE, which was a type of spacecraft used to transport astronauts from the Command MODULE to the surface of the Moon. The Landers were the spacecrafts that were used to land on the Moon's surface, while the MODULE was the spacecraft that remained in orbit around the Moon.