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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. 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.
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 ...
Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...
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Free weights are heavy, bulky, and require dedicated storage space, which can make them less accessible for home workouts or travel. Resistance bands, on the other hand, are lightweight, compact ...
The waist-to-height ratio (WHtR, [a] or WSR: waist-to-stature ratio) is the waist circumference divided by body height, both measured in the same units.. WHtR is a measure of the distribution of body fat.
HP's first scientific calculator, HP-35 With this in mind, HP built the HP 9100 desktop scientific calculator. This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions , logarithms, exponentiation, and square roots .
Women may not always get the historical credit their male counterparts do, but as these women show, they were always there doing the work. With their fierce determination and refusal to back down, all of these 12 women were not just ahead of their own times, but responsible for shaping ours.