The lunar "bus" was an early NASA Apollo logistics vehicle study. The spacecraft "bus" concept could be adapted for use first on the Saturn C-1B and later on the Saturn C-5 launch vehicles. It would deliver supplies to a manned lunar expedition.

• 1962 August 2 - Apollo lunar bus - Program: Apollo. Launch Vehicle: Saturn I, Saturn V.
  NASA's Office of Manned Space Flight issued Requests for Proposals for a study of the lunar "bus" and studies for payloads which could be handled by the C-1B and C-5 launch vehicles. Contract awards were expected by September 1 and completion of the studies by December 1.

• 1962 August 8 - Two Apollo lunar logistic studies - Program: Apollo. Launch Vehicle: Saturn I, Saturn V.
  At a bidders' conference held at NASA Headquarters, proposals were requested from Centers and industry for two lunar logistic studies: a spacecraft "bus" concept that could be adapted for use first on the Saturn C-1B and later on the Saturn C-5 launch vehicles and a variety of payloads which could be soft-landed near manned Apollo missions. The latter study would determine how a crew's stay on the moon might be extended, how human capability for scientific investigation of the moon might be increased, and how man's mobility on the moon might be facilitated.