* 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.

In 1939, he co-starred with Ginger Rogers in the RKO comedy Bachelor Mother, and starred as the eponymous gentleman safe-cracker in Raffles.

* Ginger Baker ( born 1939 ), rock drummer with Cream and Blind Faith

Pickens appeared in dozens of films, including Old Oklahoma Plains ( 1952 ), Down Laredo Way ( 1953 ), One-Eyed Jacks ( 1961 ) with Marlon Brando, Dr. Strangelove ( 1964 ), Major Dundee ( 1965 ) with Charlton Heston, the remake of Stagecoach ( 1966 ; Pickens played the driver, portrayed in the 1939 film by Andy Devine ), Never a Dull Moment ( 1968 ), The Cowboys ( 1972 ) with John Wayne, Ginger in the Morning ( 1974 ) with Fred Ward, Blazing Saddles ( 1974 ), Poor Pretty Eddy ( 1975 ), Rancho Deluxe ( 1975 ), The Getaway with Steve McQueen, Tom Horn ( 1980 ), also with McQueen, An Eye for an Eye ( 1966 ) and Pat Garrett and Billy the Kid ( 1973 ) in a small but memorable role.

Bachelor Mother ( 1939 ) is an American comedy film directed by Garson Kanin, and starring Ginger Rogers ( in a mostly non-dancing and non-singing role ), David Niven, and Charles Coburn.

Peter Edward " Ginger " Baker ( born 19 August 1939, Lewisham, South London ) is an English drummer, best known for his work with Cream and Blind Faith.

In 1939, the Castles ' life was turned into a movie, The Story of Vernon and Irene Castle, produced by RKO and starring Fred Astaire and Ginger Rogers.

Brent also played opposite Ruby Keeler in 42nd Street ( 1933 ), Greta Garbo in The Painted Veil ( 1934 ), Ginger Rogers in In Person ( 1935 ), Madeleine Carroll in The Case Against Mrs. Ames ( 1936 ), Jean Arthur in More Than a Secretary ( 1936 ), Myrna Loy in Stamboul Quest ( 1934 ) and The Rains Came ( 1939 ), Merle Oberon in ' Til We Meet Again ( 1940 ), Ann Sheridan in Honeymoon for Three ( 1941 ), Joan Fontaine in The Affairs of Susan ( 1945 ), Barbara Stanwyck in The Purchase Price ( 1932 ), Baby Face ( 1933 ), The Gay Sisters ( 1942 ) and My Reputation ( 1946 ), Claudette Colbert in Tomorrow Is Forever ( 1946 ), Dorothy McGuire in The Spiral Staircase ( 1946 ), Lucille Ball in Lover Come Back ( 1946 ) and Yvonne De Carlo in Slave Girl ( 1947 ).

The only ' new ' stations built for the original Jubilee line were the Baker Street Westbound platform ( eastbound opened in 1939 ), Bond Street, Green Park and the now closed Charing Cross.

On 20 November 1939, following the construction of an additional southbound platform and connecting tube tunnels between Baker Street and Finchley Road stations, the Bakerloo line took over the Metropolitan line's stopping services between Finchley Road and Wembley Park and its Stanmore branch.

These new tunnels opened on 20 November 1939 and from that date Finchley Road station was also served by Bakerloo Line trains running from Baker Street using the new tunnels.

The station was opened on 20 November 1939 on a new section of deep-level tunnel constructed between Baker Street and Finchley Road when the Metropolitan Line's services on its Stanmore branch were transferred to the Bakerloo Line.

Previously, in 1939, she and Baker had won the Prior Memorial prize for an essay on Furphy.

The Metropolitan line's Stanmore branch services were then transferred to the Bakerloo Line on 20 November 1939 and diverted to run into Baker Street in the new tunnels, thus reducing the number of trains using the Metropolitan Line's tracks.

The Metropolitan line's Stanmore branch services were then transferred to the Bakerloo ( now Jubilee ) line on 20 November 1939 and diverted to run into Baker Street in the new tunnels, thus reducing the number of trains using the Metropolitan lines tracks.

The Metropolitan line's Stanmore branch services were then transferred to the Bakerloo line on 20 November 1939 and diverted to run into Baker Street in the new tunnels, thus reducing the number of trains using the Metropolitan line's tracks.

* John Baker ( UK politician ) ( 1867 – 1939 ), British Labour MP for Bilston, 1924 – 1931

It was not until November 1939 that a role was found for Baker, as intelligence officer of the 28th ( Māori ) Battalion, then in the process of formation.

* Lefty Baker ( January 7, 1939, Roanoke, Virginia-August 11, 1971, California )-lead guitar, banjo, vocals ( 1968 – 69 )

Stern broadcast the first televised sporting event, the second game of a baseball double header between Princeton and Columbia at Columbia's Baker Field on May 17, 1939.

Baker entered his first race in 1939 in Greenville, South Carolina, He entered his first NASCAR race in 1949 at Charlotte Speedway., Baker went on to become one of the greatest drivers in NASCAR's history.

McGee married Loraine Baker in 1939 and together they had four children: David, Robert, Mary Gale and Lori Ann.

Notably, all of the Comintern messages to SON were sent after Baker visited Moscow in January 1939 to brief Comintern officials on the status of the party's secret apparatus ( after Baker took over its operations ).

Day appeared for the first time on Jack Benny's radio show on October 8, 1939, taking the place of another famed tenor, Kenny Baker.

* Thomas Baker ( college president ) ( 1871 – 1939 ), president of Carnegie Mellon University

An effect predating the 1939 hyperconjugation concept is the Baker – Nathan effect reported in 1935.