commercially viable typewriters were patented in the period just after the civil war. the challenge of mass-producing precise movable parts was met by refinements of earlier industrial methods. the typewriter helped standardize communications and behaviors.
Since typewriters were faster and more accurate than handwriting, they allowed for quicker and clearer documents, as well as making corrections and producing multiple copies which helped standardize the appearance of documents, which was necessary for businesses.
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As a side note: here's my Olivetti graphica (1958), with its Cassandre typeface.
















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