September 9 – George Stibitz first demonstrates remote operation of a computer, using a modified teletype working over telegraph lines between an American Mathematical Society conference at Dartmouth College in New Hampshire and the Complex Number Computer in New York.[12][13][14]
^Kamen, Martin D. (1963). "Early History of Carbon-14: Discovery of this supremely important tracer was expected in the physical sense but not in the chemical sense". Science. 140 (3567): 584–590. Bibcode:1963Sci...140..584K. doi:10.1126/science.140.3567.584. JSTOR 1710512. PMID 17737092.
^Trossarelli, L. (2010). "the history of nylon". Club Alpino Italiano, Centro Studi Materiali e Tecniche. Archived from the original on 2012-04-25. Retrieved 2012-02-28.
^Corson, D. R.; MacKenzie, K. R.; Segrè, E. (1940). "Artificially Radioactive Element 85". Physical Review. 58 (8): 672–678. Bibcode:1940PhRv...58..672C. doi:10.1103/PhysRev.58.672.
^Mcmillan, Edwin; Abelson, Philip Hauge (1940). "Radioactive Element 93". Physical Review. 57 (12): 1185–6. Bibcode:1940PhRv...57.1185M. doi:10.1103/PhysRev.57.1185.2.
^Hammond, George S. (1997). "Physical organic chemistry after 50 years: It has changed, but is it still there?" (PDF). Pure and Applied Chemistry. 69 (9). IUPAC: 1919–22. doi:10.1351/pac199769091919. S2CID 53723796. Retrieved 2014-01-22.
^Whitehead, Roger (2004). "Widdowson, Elsie May (1906–2000)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/74313. Retrieved 2011-08-10. (Subscription or UK public library membership required.)
^Smith, Michael (2007). Station X: the Codebreakers of Bletchley Park. Pan Grand Strategy Series (rev. ed.). London: Pan Macmillan. ISBN 978-0-330-41929-1.
^Ritchie, David (1986). "George Stibitz and the Bell Computers". The Computer Pioneers. New York: Simon and Schuster. p. 39. ISBN 067152397X.
^Metropolis, Nicholas (2014). History of Computing in the Twentieth Century. Elsevier. p. 481. ISBN 9781483296685.
^Dalakov, Georgi. "Relay computers of George Stibitz". History of Computers: Hardware, Software, Internet. Retrieved 2015-03-30.
^U.S. Geological Survey Geographic Names Information System: 1940 in science
^Siple, Paul (1963). "Obituary: Carl R. Eklund, 1909-1962" (PDF). Arctic. 16 (2). Arctic Institute of North America: 147–148. doi:10.14430/arctic3531. Retrieved 2013-01-19.
^Levi, F. W. (1942). Finite Geometrical Systems. University of Calcutta. MR 0006834.
^Gowing, Margaret (1964). Britain and Atomic Energy, 1935–1945. London: Macmillan Publishing. pp. 40–43. OCLC 3195209.
^Auto Editors of Consumer Guide. "1906-1939 Jeep: Jeep Makes History". HowStuffWorks. Archived from the original on 2012-05-01. Retrieved 2012-05-31.