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Exploring “mechanical adding machine”

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Before spreadsheets, one frustrated bank clerk set out to make long columns of addition less tedious.

If you wanted to add sixty-three numbers, how would you go about it? How about 1,063 numbers? Before 1888, you did it by mind, hand and pencil, no matter how many numbers contributed to the sum…

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Find in the discovery world Oct 18, 2026

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Discovered and summarized by LinkLens. We credit and link to the original creators; summaries are not independent fact-checks. Connections appear only when supported by our published discovery records.