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By the end of that decade, calculator prices had reduced to a point where a basic calculator was affordable to most and they became common in schools.
Computer operating systems as far back as early Unix have included interactive calculator programs such as dc and hoc, and calculator functions are included in almost all personal digital assistant (PDA) type devices (save a few dedicated address book and dictionary devices).
Large-sized figures and comma separators are often used to improve readability.
In 1986, calculators still represented an estimated 41% of the world's general-purpose hardware capacity to compute information. Electronic calculators contain a keyboard with buttons for digits and arithmetical operations; some even contain "00" and "000" buttons to make larger or smaller numbers easier to enter.For basic calculators, the speed can vary from a few hundred hertz to the kilohertz range.Most pocket calculators do all their calculations in BCD rather than a floating-point representation.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.
Fractions such as ; to 14 significant figures) can be difficult to recognize in decimal form; as a result, many scientific calculators are able to work in vulgar fractions or mixed numbers.