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1939 in technology
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1934
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1938
1939
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1943
1944
1880s
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1930s
1940s
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Subcategories
This category has the following 4 subcategories, out of 4 total.
C
1939 in computing
(2 C)
T
Technology companies established in 1939
(2 C, 4 P)
Technology companies disestablished in 1939
(1 C)
1939 in transport
(9 C, 2 P)
