Calculators
recomsys.net presents specialized calculators which are extremely handy and easy
to carry. Specialized Calculators manufactured by leading companies are real work
horse. These are cheap economical and fast for specialized calculations like engineering
or financial calculations. You may take very long to program these algorithms in
your desk top or lap top. Save your time and buy some of the best calculators!
Scientific calculators support trigonometric, statistical and other mathematical
functions. The most advanced modern calculators can display graphics, and include
features of computer algebra systems. They are also programmable; calculator applications
include algebraic equation solvers, financial models and even games. Most calculators
of this type can print numbers up to ten digits or decimal places in full on the
screen. Scientific notation is used to notate numbers up to a limit chosen by the
calculator designer, such as 9.999999999×1099. If a larger number or a mathematical
expression yielding a larger number than this is entered (a common example comes
from typing "100!", read as "100 factorial") then the calculator might simply display
"Error". "Error" might also be displayed if a function or an operation is undefined
mathematically; for example, division by zero or even roots of negative numbers
(most scientific calculators do not allow complex numbers, though a few do have
a special function for working with them). Some, but not most, calculators do distinguish
between these two types of "error", though when they do, it is not always easy for
the user to understand because they are often given as "Error 1" or "Error 2". Financial
calculators are similar in overall design to scientific calculators, but specialize
in time value of money calculations and are used in the accounting and real estate
professions. Only a few companies make professional engineering and finance calculators.
They include Casio, Sharp, Hewlett-Packard and Texas Instruments.
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