History of the Slide Ruler
Before we had calculators we had slide rules.
In 1632, the circular and rectangular sliderule was invented by W. Oughtred (1574-1660).
Illustration: Adding Machine
William 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 of Fame.
William Seward Burroughs
Inventor of the first workable adding machine, was born in rural New York in 1855.
Burroughs 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 1885.
Blaise 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, and more.
Articles 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.
Calculator - PC Webopaedia Definition and Links
This page describes the term 'calculator' and lists other pages on the Web where you can find additional information.