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en.wikipedia.org/wiki/Calculator

An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.. The first solid-state electronic calculator was created in the early 1960s. Pocket-sized devices became available in the 1970s, especially after the Intel 4004, the first microprocessor, was developed by Intel for the Japanese calculator ...

www.vintagecalculators.com/html/history_of_electronic_calculators.html

It used a CRT (cathode ray tube ) television tube - type of display and was also one of the first fully electronic calculators in the world. 1964 -- In March, Japan's Sony Corporation claims to perfect the world's first all-transistorized (no vacuum tube) desk-top electronic calculator.

www.thecalculatorsite.com/articles/units/history-of-the-calculator.php

However, it did this using hundred of thermionic valves as electronic on/off switches, as well as an electronic display. The application of this technology to the world's first general calculating computer had to wait until 1946 and the construction of the ENIAC (Electronic Numerical Integrator And Computer) as a completely digital artillery firing table calculator also capable of solving &quo...

classiccmp.org/calcmuseum/calc.htm

Electronic Calculator History and Technology Museum Welcome to the Electronic Calculator History and Technology Museum. The purpose of this site is to preserve the history of electronic calculators by using the Internet to display information relating to the machines developed during the 1960s and mid-1970s.

www.thoughtco.com/history-of-calculators-1991652

Long afterward came mechanical calculators, followed by electrical calculators and then their evolution into the familiar but not-so-ubiquitous-anymore handheld calculator. Here, then, are some of the milestones and prominent figures who played a role in the development of the calculator through history.

edtechmagazine.com/.../2012/11/calculating-firsts-visual-history-calculators

A Brief History: In 1956, the Bell Punch Co. of Great Britain set out to diversify from manufacturing ticket punches by producing a commercial electronic desktop calculator codenamed the ANITA. According to the Vintage Calculators Web Museum , the vacuum tube–based calculator was released in 1961 under the name ANITA MK-8.

interestingengineering.com/brief-history-calculators

The People's Best Friend: The Calculators' Brief History. The calculator has a long and fascinating history. From the timeless Abacus to the modern smartphone app this device has been people's ...

americanhistory.si.edu/collections/object-groups/handheld-electronic-calculators

In the course of the 1970s, handheld electronic calculators transformed the way tens of millions of people did arithmetic. Engineers abandoned slide rules, business people gave up desktop calculating machines, and shoppers replaced simple adding machines and adders. Educators asked how much students ...

www.computerhistory.org/revolution/calculators/1/60

Electronic CalculatorsThe Electronic Age elbowed out the Mechanical Age in the 1960s. Calculator manufacturers had to adapt or perish. Electronics firms not previously in the calculator business saw this transition as a chance to compete on a newly level field. Competition fueled innovation. By the late 1960s, desktop electronic calculators were lighter and quieter than their mechanical ancestors.

hackeducation.com/2015/03/12/calculators

A Brief History of Calculators in the Classroom. Audrey Watters ... in 1967, TI engineers developed the first handheld electronic calculator. Thanks to a number of technical developments (the integrated circuit, for starters, along with LED and LCD), these portable computing devices quickly got better and cheaper. ... The History of the Future ...