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Making the world better, one answer at a time. Calculators help in making technical math problems easy. The three most common types of calculators are handheld calculators, printing calculators, and scientific calculators. Calculators help in making technical math problems easy. The three most common types of calculators are handheld calculators, printing calculators, and scientific calculators.
There are two types of meters, auto ranging meters and manual meters. Auto ranging meters have a few selections on the dial; the meter will guess what your using it for based on the information it receives from the probes. Then there are manual ranging meters that make you select the input range it is going to use.