1930s-1940s

Toggle 1949 - De Havilland Comet

Toggle 1947 - Institution of Automobile Engineers

Toggle 1947 - GLEEP

Toggle 1947 - Breaking the sound barrier

Toggle 1945 - Turing-Welchman Bombe

Toggle 1945 - James Clayton lecture

Toggle 1944 - Calculator

Toggle 1944 - PLUTO

Toggle 1943 - Dialysis machine

Toggle 1942 - Nuclear chain reaction

Toggle 1941 - Gloster E28/39

Toggle 1939 - First working helicopter

Toggle 1939 - First rocket powered flight

Toggle 1939 - First jet powered flight

Toggle 1938 - Tumble dryer

Toggle 1938 - Steam locomotive speed record broken

Toggle 1937-1959 - Photocopier

Toggle 1937 - Jet engine

Toggle 1936-1938 - Spitfire

Toggle 1935; 1952 - Biro

Toggle 1932-1939 - BBC broadcasting, television and radio

Toggle 1932 - Piccadilly Circus electrified

Toggle 1931 - Wind generator

Toggle 1930 - Quick freeze machine