Calculators Product Guide

Calculators

Numbers are very much a part of our life and they're here to stay. To make your life a little easier, get a calculator to do most of the hard work. Calculating numbers may often seem frustrating for many people. Whether you're figuring daily expenses, investments, loans and mortgages, to science, statistics and engineering projects, there are calculators designed to simplify even the most complex problems. To help make your life a little easier, get a calculator to do most of the hard work. Learn about the different types of calculators available and see which one fits your own needs. At JR.com, shop for all types of calculators from manufacturers like Texas Instruments, Casio, Sharp, Hewlett-Packard, Canon, and others.

Consider calculators as computers - very dedicated computers that are usually very small - but like those bigger computers, calculators process numbers very quickly.

Calculators range from basic to very sophisticated - depending on what you need them for. Many are pocket-sized while some are designed for your desktop. Several models have built-in printers. For basic everyday calculations, there are General Calculators. If you're into solving complex mathematical problems, analyzing statistics, validating scientific theories, or building bridges, a Scientific Calculator may be what you're looking for. If you're thinking about the time-value of money, amortizing investments and loans, developing cost-profit models, a Business or Financial Calculator is what you need.

Simply enter numbers by pressing some buttons and, before you know it, the answer appears on an LCD or LED screen and (in some cases) a printed strip of paper. Some calculators can even display (or print) graphs and charts!

Most calculators are battery powered while some larger models (with printers) need to be plugged into a 110-Volt AC plug. There are some basic models that have solar cells and operate under average light conditions.



General Calculators


These calculators have all the basic functions of any and all calculators, which are adding, subtracting, multiplying, dividing and maybe even percent and square root functions. Almost always, there's an independent memory for storing one calculation while you're working on another.



Financial Calculators


If you're a broker, a banker or a corporate candlestick maker, money is a vital commodity and calculating budgets and finances is essential to success. Financial Calculators include the basic functions of a general calculator while adding more functions to analyze, interpret, and factor the value of money and investments.

A few companies produce financial calculators but the most respected of these is Hewlett-Packard. The Hewlett-Packard 12C financial calculator has remained unchanged and in brisk professional demand for nearly 20 years. Hewlett-Packard has other models that are easier to use or have graphing capabilities.



Scientific Calculators


Don't let the name fool you. They're not just for science. These calculators are designed with functions that allow speedier calculations for complex mathematical sequences that are integral to trigonometric and calculus functions. As far as science goes, many models can handle sophisticated formula-based problems associated with physics, chemistry, biology and psychology. Enter experimental variables and scores so you can analyze and interpret the results.

Many scientific calculators may also perform base conversions, which are essential to fundamental language structures involved in computer science.

While still remaining pocket-sized, several models have large, scrolling LCD screens that can display calculations, step-by-step, in scientific, algebraic code. These models may also have graphing capabilities that can also include 2-dimensional and 3-dimensional model calculations.

Many scientific calculators allow you to customize them for specific formula functions that you require. These are called programmable scientific calculators. Programming these models requires virtually no knowledge of languages used with computers. Programs are based on storing functions and keypunches that are used to perform the calculation. You can then automatically initiate the program while entering different values that need calculating.

Some of the more sophisticated models may have (included or optional) connectivity with Windows or Macintosh computers. Although virtually all models do not come with integrated printers, a printer may be available as an optional accessory.

Nest to general calculators, scientific calculators are in high demand by students, academicians and scientific professionals. Many companies produce scientific calculators and prices range from under $10 to over $200. There are many models to choose from that may meet your needs.



Printing Calculators


Calculators with built-in printers usually are designed for general purposes and have similar functions as general calculators. The may also have certain functions for figuring mark-up and profit percentages. There is always a switch to choose whether you want the results printed or just displayed on the calculator's built-in screen. You can also choose the number of decimal places that you want the unit to calculate at.

There are portable units that can be carried in a briefcase. These usually can operate on 2 to 4 AA batteries or an AC adapter. There are larger models intended for office use. They may have speedier, heavier-duty mechanisms. 110-Volt AC current at your home or office usually powers these models.

Many printing models print in two colors. Additions (and most other functions) print in black, Subtractions print (usually) in red. When doing long calculations, involving addition and subtraction, the 2 colors allow for easier editing.





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