The idea of what I later called the … calculators at that time. … [p. 28] … on June 27, 1949 in Britzlmayr's seminar … Konrad Zuse, while giving a survey of his … [ref] … an example of a Plankalkul program (a Rechenplan, … [p. 29] Schroter [Schroter, K. 1943] expressed it mathematically: a parentheses-free … of its right segments is positive. The rank … sequence, where the weight of a symbol with … is 1-n
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