A week ago I wrote about my father’s slide rule – the one he gave me: the one he used as a civil engineer. Today my uncle sent me a 1963 photograph of my father, at work, using his slide rule – the one he gave me. I did not know this photograph existed. My uncle added a photograph of his own collection of slide rules (below). The way we were: the slide rule (blog, October 5, 2015) My father gave me my first, and only, slide rule. It was a big deal back then. I was in the last year of high school, and my father – a civil engineer – proudly gave me, his daughter, his work slide rule because I was the only one in the family going onto university to study mathematics. It was like getting a car! Calculators weren’t around then, but I did have an abacus. With an abacus and a slide rule I could do anything! I am reminded of my first slide rule because I saw one on display in a museum recently. It was a Russian slide rule. Mine was a ...