Brunsviga hand calculator - 1959 38 of 51
30 of these were purchased by Nottingham University for 115 pounds. They could multiply two values of up to 11 decimal digits.
The Mathematics Department's numerical analysis classes involved a weekly 3-hour laboratory session during which the students used Brunsvigas. When you needed to turn a handle to produce results, you were very concerned about the efficiency of the methods.
Some significant complex research calculations were completed by using the whole class to perform related calculations.
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