Today’s post is
a guest post from Christine of Web Technology USA ( http://www.webtechnologyusa.com/ ),
and she is going to talk about their online scientific calculator which can be
downloaded, the eCalc. I played with the
eCalc and it is really nice and well organized.

Christine,
thank you for emailing me and allowing me to share. Much appreciated.

Take it away,
Christine.

Eddie

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**eCalc Scientific Calculator**

**(by Christine of Web Technology USA)**

Screen shot of eCalc, provided by Christine - Thanks |

On the 21st century where nearly everything can be processed
online, each device may now have its web-based counterpart. And calculators are
no exemption. From the Abacus of 2000 BC to the Arithmometer of 18th century,
the evolution of this device has been in sync with the times. Coming into the
scene is eCalc, a readily available software that is offered as both online
calculator and as a downloadable application.

**eCalc**is a free and easy to use scientific calculator that supports many advanced features including unit conversion, equation solving, and even complex-number math. This application operates in either algebraic input or Reverse Polish Notation (RPN). The algebraic input is the default mode which is widely used by most handheld calculators. RPN, on the other hand, is a stack-based notation where operators are designed to follow their operands.

Data entry on this calculator is quite straightforward. This is
achieved by the use of a graphical button or through traditional keyboard keys.
In fact, the user is given the option to use either input method which are both
equally valid. However, due to the limited amount of space available for graphical
button placements, some trigonometric functions are limited to computer
keyboard entry only. Aside from certain basic functions, all hyperbolic
trigonometric functions need to be entered by typing their keywords
accordingly.

eCalc is divided into two sections: the scientific calculator
interface on the left and the calculator pallet on the right. The pallet houses
a display area for special features such as Unit Converter, Constants Library,
Equation Solver, Polynomial Solver, Base Conversion, and Decimal to Fraction
Conversion.

Another notable feature of eCalc is “stack”. This particular
attribute is inherent providing the user a way to view a history of results.
Although the stack displays only 4 items at once, one can scroll up and down
the stack by clicking the up and down arrow above it. A user even has the
option to “pop” down a value currently existing in the stack into the input
field of the calculator by clicking on the down arrows to the left of the line
in the stack.

Simple yet robust, eCalc can solve other forms of mathematical
equations be it basic or complex placing it a notch above battery-powered
handheld calculators. And due to its nature being a standalone software, it is
capable of being updated with future possible functionalities.

eCalc Scientific Calculator is available for Windows Desktop and
Mac OS X Dashboard.

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This blog is property of Edward Shore, 2017.

I've been using eCalc for several years; it's powerful and simple; I wish there was a scientific pocket calc with its elegance and simplicity.

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