* 1939 – 1945, the Second Battle of the Atlantic.

Subsequent formalizations were framed as attempts to define " effective calculability " or " effective method "; those formalizations included the Gödel – Herbrand – Kleene recursive functions of 1930, 1934 and 1935, Alonzo Church's lambda calculus of 1936, Emil Post's " Formulation 1 " of 1936, and Alan Turing's Turing machines of 1936 – 7 and 1939.

* 1890 – Anthony Fokker, Dutch aviation engineer ( d. 1939 )

* 1939 – André Ouellet, French-Canadian politician

* 1852 – Ferdinand von Lindemann, German mathematician ( d. 1939 )

* 1939 – Alan Ayckbourn, English writer

* 1939 – Johnny Raper, Australian rugby league footballer

* 1939 – The 1939-40 New York World's Fair opens.

* 1939 – NBC inaugurates its regularly scheduled television service in New York City, broadcasting President Franklin D. Roosevelt's N. Y. World's Fair opening day ceremonial address.

* 1939 – First flight of the turbojet-powered Heinkel He 178, the world's first jet aircraft.

* 1939 – William Least Heat-Moon, American author

* 1939 – Edward Patten, American singer-songwriter and producer ( Gladys Knight & the Pips ) ( d. 2005 )

* 1939 – Bulle Ogier, French actress

* 1939 – Romano Prodi, Italian politician and statesman

* 1939 – Hércules Brito Ruas, Brazilian footballer

* 1939 – Albert Einstein and Leó Szilárd write a letter to Franklin D. Roosevelt, urging him to begin the Manhattan Project to develop a nuclear weapon.

* 1939 – Benjamin Barber, American theorist

* 1939 – Wes Craven, American director

* 1939 – John W. Snow, American politician, 73rd United States Secretary of the Treasury

* 1984 – Marvin Gaye, American singer ( The Moonglows ) ( b. 1939 )

* 2001 – Trinh Cong Son, Vietnamese composer ( b. 1939 )

Eastern European theorists include Pyotr Stolypin ( 1862 – 1911 ) and Alexander Chayanov ( 1888 – 1939 ) in Russia ; Adolph Wagner ( 1835 – 1917 ), and Karl Oldenberg in Germany, and Bolesław Limanowski ( 1835 – 1935 ) in Poland.

His 146 runs scored were the most since Ted Williams had 150 in 1950, and he became the first player since Jimmie Foxx in 1939 to amass more runs scored than games played.

He is the youngest player ever to hit 500 home runs, breaking the record Jimmie Foxx set in 1939, and the youngest to hit 600, besting Babe Ruth's record by over a year.

: 5 Jimmie Foxx ( 1932 – 1933, 1935, 1938 – 1939 )

: 5 Jimmie Foxx ( 1932 – 1933, 1935, 1938 – 1939 )

: 4 Jimmie Foxx ( 1932, 1933, 1935, 1939 )

Merriam-Webster's Dictionary of English Usage says, " The list contains ( in approximate historical order from 1789 to 1939 ) such terms as Columbian, Columbard, Fredonian, Frede, Unisian, United Statesian, Colonican, Appalacian, Usian, Washingtonian, Usonian, Uessian, U-S-ian, Uesican, United Stater.

* 1939 – Dusty Springfield, English singer ( The Lana Sisters and The Springfields ) ( d. 1999 )

* 1939 – Ginger Baker, English drummer and songwriter ( Cream, Blind Faith, Blues Incorporated, and Atomic Rooster )

* 1939 – John Peel, English radio host and producer ( d. 2004 )

Sir Alan Ayckbourn CBE ( born 12 April 1939 ) is a prolific English playwright.

* 1939 – Kate O ' Mara, English actress

* 1939 – David Frost, English broadcaster and television host

* 1939 – Philip Langridge, English opera singer ( d. 2010 )

* 1992 – Michael Gothard, English actor ( b. 1939 )

( 1939 ), " Roger Leyburn and the Pacification of England, 1265-7 ", English Historical Review, 54.

John Dewey and English Education ( 1895 – 1939 ).

One result was the creation by the American company MGM of an English studio MGM-British in Hertfordshire, which produced some very successful films, including A Yank at Oxford ( 1938 ) and Goodbye, Mr. Chips ( 1939 ), before World War II intervened.

* 1939 – Gwen Taylor, English actress

* 1939 – Josephine Tewson, English actress

Since at least the 1960s, when Marc Bloch's Feudal Society ( 1939 ) was first translated into English in 1961, many medieval historians have included a broader social aspect that includes not only the nobility but all three estates of the realm, adding the peasantry bonds of manorialism and the estates of the Church ; this is sometimes referred to as " feudal society " since it encompasses all members of society into the feudal system.

He developed his ideas in Feudal Society ( 1939 – 40 ; English 1961 ).

Howard Carter ( 9 May 18742 March 1939 ) was an English archaeologist and Egyptologist known for discovering the tomb of 14th-century BC pharaoh Tutankhamun.

* 1939 – Tony Bullimore, English sailor and adventurer

* 1939 – Michael Gothard, English actor ( d. 1992 )

* 2009 – Bill Frindall, English cricket scorer and statistician ( b. 1939 )

* 1939 – Ian Hunter, English singer-songwriter and musician ( Mott the Hoople )

* 1939 – Jet Harris, English bassist ( The Shadows, The Jeff Beck Group, and The Vipers Skiffle Group ) ( d. 2011 )

* 1939 – Mary Peters, English athlete