en.wikipedia.org/wiki/Calculator

The first portable calculators appeared in Japan in 1970, and ... came out in the
Autumn of 1971, with four functions and an ...

www.reference.com/math/four-function-calculator-6bc7cae6e3704afd

Full Answer. A four-function calculator is the simplest type of pocket calculator
and is suitable for basic arithmetic. Calculators with higher functioning abilities
are ...

www.vintagecalculators.com/html/hand-held_calculators.html

Two of the first hand-held calculators, based on Texas Instruments technology.
Sanyo ICC-82D 1970. Four-function, amber gas-discharge tubes. One of the first
...

www.vintagecalculators.com/html/history_of_electronic_calculat.html

The History of Pocket Electronic Calculators .... Selling for just under $400, the "
Pocketronic" was a four function, hand-held, printing calculator, with the only ...

www.vintagecalculators.com/html/electronic_calculators__1965-7.html

By the dawn of the pocket electronic calculators in the early 1970's prices had
fallen significantly but a simple four-function model could still set you back more ...

www.schoolmart.com/parcc-basic-four-function-calculators-for-grades-6-7/

Grades 6-7: PARCC Compliant Four-function calculators with square root and ...
If schools or districts permit students to bring their own hand-held calculators for ...

www.staples.com/Basic-Calculators/cat_CL90000

Select basic calculators small enough to fit into your pocket, so you can make ....
friendly computing device offers the four basic functions: addition, subtraction, ...

hackeducation.com/2015/03/12/calculators

Mar 12, 2015 ... But the calculator seems to evoke all sorts of fears that students' ... handheld
calculators – all scientific calculators and all four-function ones ...

www.walmart.com/browse/office/basic-calculators/1229749_1070964_1479667_9083235

Shop for Basic Calculators in Calculators. Buy products such as Sharp EL233SB
Pocket Calculator at Walmart and save.