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Other calculator manufacturersNational Museum of American History
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77% Informative
Handheld electronic calculators transformed the way tens of millions of people did arithmetic in the 1970s .
Hewlett-Packard Corporation joined the market in early 1972 with the HP-35 scientific calculator.
By 1977 , a liquid crystal display calculator known as the Teal LC811 sold regularly for $ 24.95 , with sale price of $ 19.95 .
In 1971 , Jerome C. Meyer and James A. Tillotson III of Sunnydale , California , received a patent for a “teaching device having means producing [sic] a self-generated program” Ideas in this patent were reflected in an electronic teaching machine for drilling children in basic arithmetic called the Digitor .
The role of the electronic calculator has changed in mathematics education.
Calculators do not allow students to spend time texting, web surfing, or consulting with unauthorized sources.
They are sometimes built so as NOT to evaluate certain functions.
In the larger world, inexpensive four -function calculators are still available for purchase.
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