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[[:Calculator 1899 Calculator Champaign County Historical Museum Attribution.jpg|200px|thumb||A calculator created by Otto Steiger and Hans W. Egli on 1899 - Image by Dori and the Champaign County Historical Museum. ]]
Latest revision as of 19:02, 30 January 2013
A device used to perform basic arithmetic
Pages in category "Calculators"
The following 18 pages are in this category, out of 18 total.
Media in category "Calculators"
This category contains only the following file.
- Ada Lovelace.jpg