of the Slide Ruler
Before we had calculators we had
In 1632, the circular and rectangular
sliderule was invented by W. Oughtred (1574-1660).
Seward Burroughs Born 1857 Rochester, N.Y - Died 1898
In 1885, Burroughs filed his first
patent for a calculating machine. However, his 1892 patent was for an improved
calculating machine with an added printer. William Seward Burroughs invented
the first practical adding and listing machine - National Inventors Hall
Inventor of the first workable adding
machine, was born in rural New York in 1855.
Adding Machine Company
Burroughs Adding Machine Company
traced its founding to William Seward Burroughs who invented and patented
the first workable adding and listing machine in St. Louis, Missouri in
Pascal (1623 - 1662)
Blaise Pascal invented the first
digital calculator to help his father with his work collecting taxes.
Information on the history of the
Calculating Machine, and the inventors including Blaise Pascal, Da Vinci,
on the History of Electronic Calculators
An amazing collection of article,
among the many articles listed are: Old Casio Calculators - Heinz Nixdorf
- Dr. An Wang - HP or the death of the Slide Rule - The Calculator Wars.
This site includes historical and
collectible information for collectors of calculators.
Vintage Calculators presents a gallery
of vintage calculators, online calculator stimulations, articles on the
history of calculators and more.
- PC Webopaedia Definition and Links
This page describes the term 'calculator'
and lists other pages on the Web where you can find additional information.
Documents on the History of Calculators
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