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A calculator is a device used for a variety of mathematical calculations, ranging from simple addition and subtraction to more complex operations involving trigonometric functions. Calculators have by and large replaced paper-and-pen calculations, and are even allowed to be used in some school districts. more »
Printing calculators, which are alternatively known as adding machines, work slightly differently than normal calculators and also have the added benefit of printing off every calculation so you can double-check your work later. Although the extra features may seem confusing at first, they will become much more clear with a little... more »
The age of broadband networking, combined with the explosion of personal video sharing web sites online, as fueled a number of phenomenon that brings out the techno-geek in all of us. One such video is a film produced by a teenage boy, known only as "Razorg606". This video spread across the Internet like wildfire, because it contained... more »
Before you ask for a raise, consider whether you merit a raise and whether your company is in a position to give you one. If so, then choose your moment and your methods to ask for a raise very carefully. more »
At most job interviews, a question about salary will come up. Many times, the employer will ask you your last salary figure and how much you expect to make if you are hired by this company. If the interview is going well or this is a call-back interview, a salary offer may be made while you are there in person. How do you respond when... more »
"The husband who wants a happy marriage should learn to keep his mouth shut and his...
Preparing your taxes no longer has to be a long, complicated process involving calculators and...
There are calculators you can find online that you can use to calculate just about anything. If you are trying to find out how much it will cost... more »
Mathematics education has changed considerably. What was once the province of laborious calculations with paper and pencil is now a concept-driven... more »
Casio is a leading manufacturer of electronic devices, and is regarded as a pioneer in the electronic calculator market. It has production and... more »
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Calculators are a necessity in many offices, homes and backpacks. Finding the right calculator can be tricky and choosing the wrong calculator can... more »
A calculator is a device that is used for performing mathematical calculations. It differs from a computer by having a limited problem solving ability and an interface optimized for interactive calculation rather than programming. Calculators can be hardware or software, mechanical or electronic, and are often built into devices such as PDAs or mobile phones.
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Modern electronic calculators are generally small, digital, (often pocket-sized) and usually inexpensive. In addition to general purpose calculators, there are those designed for specific markets; for example, there are scientific calculators which focus on operations slightly more complex than those specific to arithmetic - for instance, trigonometric and statistical calculations. Some calculators even have the ability to do computer algebra. Graphing calculators can be used to graph functions defined on the real line, or higher dimensional Euclidean space. They often serve other purposes, however. Modern calculators are more portable than most computers, though most PDAs are comparable in size to handheld calculators.
Overview
In the past, mechanical clerical aids such as abaci, comptometers, Napiers bones, books of mathematical tables, slide rules, or mechanical adding machines were used for numeric work. This semi-manual process of calculation was tedious and error-prone.
Modern calculators are electrically powered (usually by battery and/or solar cell) and vary from cheap, give-away, credit-card sized models to sturdy adding machine-like models with built-in printers. They first became popular in the late 1960s as decreasing size and cost of electronics made possible devices for calculations, avoiding the use of scarce and expensive computer resources. By the 1980s, calculator prices had reduced to a point where a basic calculator was affordable to most. By the 1990s they had become common in math classes in schools, with the i read more at » http://en.wikipedia.org/wiki/Calculator
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