Calculators - A Boon or A Bane

A calculator is a device, usually hand-held, for calculating mathematical expressions. In the past, calculations were done in the head, on paper or by a semi-manual machine. But, this process of semi-manual calculation was prone to errors and time-consuming. Calculations done on paper also were not totally error-free and working out large sums in the head was not for everyone.

To simplify all those complicated mathematical calculations then came calculators designed. In the beginning, these electronics devices were very expensive. This was because the mechanical and electrical parts of the calculator were expensive to produce. However, as the prices of these parts fell and production techniques became better, calculators like the Hewlett Packard 12c calculator, too, became less costly and in fact, were very soon easily affordable to the average person.

In the past, calculators were as big as computers today but, soon, pocket-sized devices were available. Calculators can come in hardware or software versions and they can be mechanical or electronic. They are built into computers, mobile phones, pagers and even wrist-watches. Modern calculators are normally electrically powered and may range from small, wallet-sized models to strong adding-machine like models.

A basic calculator has a power point, a display unit, electronic circuit and a keypad. There are now many advanced variations of calculators available, each performing a specific function. For example, the scientific calculator is designed for advanced mathematics like trigonometry and statistics. The hp 12c calculator will help in accounting and real-estate deals. The mortgage ones will show you what exactly you have to pay on your house.

Apart from these there are loan, lease, time, love, area, temperature and the most advanced of them all, graphing calculators. These are all basically online calculators but they do have certain anomalies, like, if the numbers get too big or too small, some errors in calculations can occur.