The first calculators were abacuses, followed by the slide rule (invented by William Oughtred in 1622), and then mechanical calculators like the Comptometer in the early 1900s. Electronic calculators emerged in the 1960s, but were large and heavy because they required many transistors. It wasn't until the 1970s that integrated circuits made small portable electronic calculators possible.
I’m 61 now, and I’m an engineer. I was thinking if I ever wanted to collect something, I would probably c… [more]
This gallery of hundreds of LCD and calculator watches from the 1980s includes nerd-friendly brands like Casio, Sei… [more]
Andrew Davie's showcase of information about vintage Soviet calculators. Browse sections including mechanical monst… [more]
Emil Dudek's guide to 1970s desktop and pocket calculators. Includes over 550 calculators and 120 brands. Beautiful… [more]
Brooke W. Boering's definitive reference on the Comptometer, a turn of the (20th) century 'shoebox' business calcul… [more]
David Hicks' celebration of Hewlett Packard calculators from 1968-1986. Photos and detailed descriptions of each mo… [more]
This site showcases pre-1920 office antiques, including paperweights, writing ink, paper fasteners, seal pressers, … [more]
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