14 January - First broadcast on Swedish national radio (AB Radiotjänst) of one of the world's longest-running radio programmes, Barnens brevlåda ("Children's letterbox"), which was to run for 1,785 editions - all presented by "Uncle Sven" (the radio sports commentator Sven Jerring) - until 1972.
21 March - Lowell Thomas is first heard on the radio on Pittsburgh station KDKA.