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M. I. T. Calculator 1930SThe Differential Analyser calculating machine designed at Massachusetts Institute of Technology
Ancient altars, characters, and John Napiers bonesAncient altars, ark of the covenant, Chinese musical instrument Ching and King, John Napiers calculating bones, and ancient arithmetical characters
Curtis British Entomology Plate 73Hymenoptera: Bassus calculator = Microdus calculator (Beautiful Bassus) [Plant: Vaccinium myrtillus (Bilberry)] Date: 1824-39
ODHNERS CALCULATOR 1904Odhners calculator. Date: 1904
Messrs. Scheutzs New Calculating MachineMessrs. Pehr (Per) Georg Scheutz (1785-1873) and Edvard Scheutzs (of Stockholm, Sweden) New Calculating (Tabulating) Machine
Inaudi, the lightning calculator, performing at the Hippodrome, able to do mentally any sum given by the audience up to twelve figures in addition, subtraction and multiplication. Date: 1903
Accounts DepartmentA mature accountant wearing spectacles goes through her ledger, pinpointing any discrepancies. Date: 1960s
RAFVR at Gatwick. The chief Ground Instructor gives a lesson on finding the course to steer by the aid of a course and speed calculator
I. Calculator Esq: The Celebrated ConjurorCopy of illustration, " I. Calculator Esq: The Celebrated Conjuror" by A.B. 30 August 1776. HPG/8/2/1 (v)"
Pascals CalculatorPASCAL Pascals calculating machine