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Willgodt Odhner, the inventor of the first mass produced calculator was born on August 10, 1845.
Derivative and partial derivative
First order ODE
Definite integral and mean value
Geometrical applications of definite integral
Local maxima and minima in two variables
Domain of functions (one variable)
Domain of functions (two variables)
Least squares method
Second order LDE
Fixed point iterations
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Cellatron R43SM - the ultimate calculator. One of the topmost models across various producers. Also one of the last models of mechanical calculators ever
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