The John P. Rankin Collection includes approximately 250 documents contained within 183 folders, and 8 primary subjects covered within this collection include a wide range of aerospace technology, such "topological sneak circuit analysis" and "Common Case Failure Analysis," the latter developed to use sneak circuit analysis core elements to determine susceptibilities of a complex system to experience critical unplanned events caused by build-up of multiple unnoticed failure events and unexpected operations or environmental circumstances. Actual project final reports are included in the collection along with technical papers.