This contains records of Configuration Control Board (CCB) meetings from 1970 to 1973. These are the original office files of Skylab Program Manager and CCB Chairman Kenneth S. Kleinknecht. Board meetings were often conducted by teleconference call as membership comprised personnel from MSFC, KSC, MSC, NASA Headquarters, and various contractors. Minutes of meetings make up most of this subseries, but it also incorporates agendas, directives, handout materials, and engineering design change requests.