In this Section

• 1938 Proposal
• Letter of Nomination for the Medal for Merit
• 1942 Research Report
• 1943 Roster
  • 43 Roster, page 2
• 1944 Roster
  • 44 Roster, page 2
• History of Op-20-G-4E
• Records of the USNCML
  • Orders 22 Sept 1943
  • Orders 22 Nov 1944
  • Orders 3 Jan 1945
  • Orders 1 Oct 1945
  • Orders 7 Feb 1946
  • Orders 28 Jun 46
  • Orders 15 Aug 1946
  • Navy Contract NXs7892
  • Numbers used in reference to Navy Equipment
  • Report by Joseph Wenger
  • Personnel numbers
  • Meader Postwar Report on the NCML
    • Pages 13-20
    • Pages 21-25
  • Commendation
• Smithsonian Interview, first session
  • Interview, second session
  • Interview, third session
• CNO to Adm. King
• Electronics
  • Patents belong to the ERL
  • Chassis of the Cryptanalytic Bombe
  • Cryptanalytic Equipment in operation
  • Specs for the Thyratron
  • Electronic chassis for the Bombe
• Bombe correspondence–Roosevelt
• Teletype messages, June 1943
  • Personnel in teletype messages
    • Personnel in messages, p. 2
  • Glossary of terms in messages
    • Glossary, second page
• Patent applications, June 1945
• The ERL in the NCR News
  • NCR News: Purple Heart Ceremony
  • NCR News April 1944
  • May 1944 NCR News
  • June 1944 NCR News
  • July-August 1944 NCR News
  • NCR News September 1944
  • NCR News October 1944
  • NCR News December 1944
  • March 1945 NCR News
• Bombe Project History, May 44
• The Story of You in Navy Blue
• Use of Navy WAVES

There are many documented sources of information regarding the Dayton code breaking effort. The most dramatic and detailed are at the National Archives at College Park, Maryland. However, some documents remain in the NCR Archive at Dayton History. And there is much research yet to be done. The list above are links to documents and information available at this site.