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The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand. It was affectionately known as the "pepper grinder" or "peppermill" due to its shape and means of operation; its superficial resemblance to a certain type of hand ...
Curta (Type I) mechanical calculator shown in the operational position (left hand). The crank is turned with the right hand. Curt Herzstark at the 1910 office equipment exhibition in Vienna. Curt Herzstark (January 26, 1902 – October 27, 1988) was an Austrian engineer. During World War II, he designed plans for a mechanical pocket calculator ...
The first Curta handheld mechanical calculator was sold. The Curta computed with 11 digits of decimal precision on input operands up to 8 decimal digits. The Curta was about the size of a handheld pepper grinder. 1949 Mar United States: John Presper Eckert and John William Mauchly construct the BINAC for Northrop. 1949 May 6 United Kingdom
In 1948 the cylindrical Curta calculator, which was compact enough to be held in one hand, was introduced after being developed by Curt Herzstark in 1938. This was an extreme development of the stepped-gear calculating mechanism. It subtracted by adding complements; between the teeth for addition were teeth for subtraction.
The Curta calculator was developed in 1948 and, although costly, became popular for its portability. This purely mechanical hand-held device could do addition, subtraction, multiplication and division. By the early 1970s electronic pocket calculators ended manufacture of mechanical calculators, although the Curta remains a popular collectable item.
Berkshire’s cash pile grew to $334 billion in 2024, up from $167.6 billion the year prior.. Buffett acknowledges that the value of marketable equities — companies that continue to trade ...
Z1, 1938 (ready in 1941) – Konrad Zuse's mechanical calculator (although part imprecisions hindered its function) [13] Mark I Fire Control Computer, deployed by the United States Navy during World War II (1939 to 1945) and up to 1969 or later. Curta calculator, 1948; MONIAC, 1949 – An analog computer used to model or simulate the UK economy.
VP JD Vance, 40, made history on as the first of his generation in the role. His moment highlights another generation's notable absence.
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