desk calculating machine

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• calculator — /kal kyeuh lay teuhr/, n. 1. a person who calculates or computes. 2. Also called calculating machine. a small electronic or mechanical device that performs calculations, requiring manual action for each individual opertion. 3. a person who… …   Universalium

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• cal|cu|la|tor — «KAL kyuh LAY tuhr», noun. 1. a) a calculating machine or computer: »The bookkeeper used a desk calculator to help keep the accounts. It will be immediately appreciated that within the calculator proper there is need for considerable storage of… …   Useful english dictionary

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• Douglas Hartree — Douglas Rayner Hartree PhD, FRS (27 March 1897 – 12 February 1958) was an English mathematician and physicist most famous for the development of numerical analysis and its application to the Hartree Fock equations of atomic physics and the… …   Wikipedia