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First manufactured in 1996, there have been numerous variations of the CFX-9850G. The 9850 series models have 3-colour screens apart from the fx-9750G which is black and white. The 9950G has 64k memory compared to the 32k of the original 9850G. The 9970G has symbolic algebra.
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.
A slide rule is a hand-operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry. It is one of the simplest analog computers. [1] [2]
The manufacturing cost of Bollée's machine was too high and the production was discontinued after a few units. The Millionaire was built with the same target of direct mechanical multiplication in mind. [14] In first decades of 20th century two other machines with direct multiplication were produced: the Moon-Hopkins [15] and Kuhrt-US. [16]
Otto Steiger (1858–1923) was a Swiss engineer. Steiger came from St. Gallen and lived in Munich.. Steiger is known for the invention and construction of the Millionaire mechanical calculator, the first commercially successful direct multiplication calculator (German patent 1892).
A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.
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The multiplication sign (×), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. [ 1 ] The symbol is also used in botany , in botanical hybrid names .