Joan Clarke Murray codebreaker at Bletchley Park during World War II, became deputy head of Hut 8 in 1944. Code breaking was almost exclusively done by men during the war. Clarke was paid less than the men and felt that she was prevented from progressing further because of her gender. She was a English cryptanalyst and numismatist ~
See many images of women's war work in the UK and the US at https://www.pinterest.com/yrauntruth/women-at-war-homefront/ and https://www.pinterest.com/yrauntruth/wartime-food-cooking-rationing-victory-gardens/ and https://www.pinterest.com/yrauntruth/women-at-war-nurses/
During both World Wars, many civilian women took up jobs in agriculture, replacing those men who went to war. The women who worked for the Women's Land Army (WLA) were commonly known as Land Girls. In forestry, Women's Timber Corps were known as Lumber Jills. At the height of the First World War the Land Army had a full-time membership of 23,000 members. The number exceeded 80,000 during the Second World War.