Codes and Ciphers
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
unitdate: label: Date
content: 1894-1947
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0055, Series 108
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents note
content: Series 108 contains the files of Major Donald D. Millikan, code and cipher expert, and is comprised of examples from the Cryptology School both he and the Army ran including: announcements; questions and answers to exercises; class lists by student; correspondence, 1915-1937; data sheets; home work; memoranda; problems in cryptanalysis; and tests. Also there is a typed "book" titled Cryptography and Crystanalysis by Milikan. Also included are articles; cartoons; code tapes; codes; news clippings; periodical clippings; and photographs pertaining to this subject.