William Seward Burroughs invented the first practical calculator - the history of calculators. ... Original Documents on the History of Calculators; Patent drawings

The Charles Babbage Institute is an archives and research center dedicated to promoting study of the history of information processing and its impact on society.

Early 1960's -- Mechanical calculators, slide rules, or paper and pencil are the world's main methods of calculation. ... 1970 -- The first battery-operated "hand-held" calculators are sold.

Vintage Calculators: old mechanical & electronic calculators; british hand-held & desk; british sterling currency £sd calculators; comptometers; ... Mechanical & early electronic desk calculators.

History of Calculators ... History of Calculators - Timeline ... History of Electronic Calculators

Articles on the History of; Electronic Calculators ... The History of Calculators and Computers ... Soviet Calculators History

; A Brief History of Mechanical Calculators ... The journey starts 2500 years ago with the Abacus, and ends 30 years ago with the introduction of the first electronic calculators.

This site contains HTML-versions of some original documents related to the early history of calculators.

I've been seriously collecting calculators for a few years now, but my interest in them dates back to my high school days.

A collection of early mechanical calculating machines and other calculating devices. ... · Diagram of history manufacturing of mechanical calculators.