__Created by David Alderoty ©
2011__

__To contact the author use:
David@TechForText.com or left click on these words for a website communication form.__

Two paragraphs below, there is an
online calculation device, ** Database-Scientific-Calculator,** that has three
built-in databases, that operate as a single unit,

The Database-Scientific-Calculator is
also available for download, free of charge in Microsoft Excel 2003, Excel
2007-2010, OpenOffice Calc,
and JavaScript formats. (Excel and OpenOffice versions
require Microsoft Windows)

You can download all of the above,
in one
zip folder, by left clicking on these words.

**Ideally,
before using the download versions or the online version, of the
Database-Scientific-Calculator, you should read:**

__A Brief Discussion, The Calculator__

**And**

**To go directly to either of the
above, left click on one of the titles, or scroll down beneath the online
Calculator. Alternatively, you can go to the
hyperlink table of contents of this website, by left clicking on these
words. **

__The Online Database‑Scientific‑Calculator__

__General ____Information,____ and Instructions
for the Database‑Scientific‑Calculator__

__A Brief Discussion,
____The____
Calculator__

The Database-Scientific-Calculator
can carry out calculations involving: addition; subtraction; multiplication;
division; logarithms with any base, including **e**; hyperbolic and trigonometric
calculations, for sine, cosine, tangent, cotangent, secant, and cosecant, with
angles in degrees or radians. It
also has built-in formulas to calculate the perimeter and area of a circle, the
surface area and volume of a sphere, and the number of other functions.

This calculation device is a useful
variation of the conventional scientific calculator. However, the ** Database-Scientific-Calculator**
was primarily created as an experiment, to demonstrate the feasibility and
utility of creating software-based calculation devices with built-in
databases.

The Database-Scientific-Calculator
has about 50 functions, 14 of which are experimental. However, devices of this nature could
hold hundreds or even thousands of functions. This can involve highly complex sets of
formulas acting as a single function, as well as functions that carry out a
series of logical computations with words.
It was technically feasible to load the Database-Scientific-Calculator,
with thousands of functions, especially the Excel version. However, the limiting factor was the
time required for such a task.

The Database-Scientific-Calculator
automatically retrieves instructional text for each function stored in its
database. This feature may be
useful for educational purposes, such as instructions that explain mathematical
operations in a step-by-step way, accompanied with calculated results. This is obviously feasible, from a
technical perspective, because devices such as the
Database-Scientific-Calculator can store large quantities of instructional
text. Devices created with this
design concept, can retrieve information based on a word, a sentence, or a
question. However, the
Database-Scientific-Calculator was programmed to respond to a few mathematical
symbol, and one or two words. This
is also the result of time limitations.

INTRODUCTION: The
Database‑Scientific‑Calculator is very easy to use. No skills or training are needed for
this device, and most people can use it successfully, with a minimum of
effort. You will probably find the
instructions on the input and display boxes adequate, coupled with five minutes
or so of trial and error learning.
However, detailed instructions are presented in the following
paragraphs.

THE INPUT BOXES: Before entering or
deleting numbers in an input box, you must left click on it first, and then
immediately enter the number. There
are three input boxes, and they are white.
One is on the upper center of the calculator, and two boxes are located
on the left and right. The input
boxes, on the left and right are for calculating numbers.

The input box on the upper center of
the calculator is not directly involved with the calculations. The number in this input box determines
the number of decimal places that are displayed in calculated results. The default is 9 decimal places, but you
can change this to any number you prefer.

THE DISPLAY BOXES: The display boxes
show data that changes when the mathematical operation is changed, such as
calculated results, instructions or other information. These boxes are light blue on the upper
section, and light yellow on the lower section. The calculated results, and related
instructional text, are displayed in the lower yellow section, in red type.

There are three display boxes, and
they are labeled, DISPLAY BOX 1), DISPLAY BOX 2) and DISPLAY BOX 3). DISPLAY BOX 1) shows an equivalent
spreadsheet formula for the calculations chosen by the user. DISPLAY BOX 2) presents the calculated
results. DISPLAY BOX 3) provides
information in a text format, which includes instructions or other information
for each mathematical operation programmed into the calculator.

THE PINK PULL-DOWN MENU, FOR
SELECTING MATHEMATICAL OPERATIONS:
There is a pink pull-down menu to select the mathematical operation that
you want, such as for multiplication, division, finding the square root of a
number, etc. The pull-down menu
also has settings to display information without any calculations, such as
general instructions. When you open
the Database Scientific Calculator, the pink menu is set to display a summary of
general instructions, in one paragraph.

HOW TO USE THE PINK PULL-DOWN MENU:
To use the pink pull-down menu, left click on it with the mouse, and a menu will
open. Then scroll up or down, to
find the mathematical operation that you are looking for. When you find it, left click on it, and
the menu will close, and the mathematical operation will perform the
calculations, if you have numbers in the required input box, or input
boxes. If you do not have numbers
in the input boxes, enter the number(s) and left click with the mouse on the
yellow section of the calculator, and the calculated results will be
displayed. With the online version
and downloadable JavaScript versions of the Database‑Scientific‑Calculator, you
can also left click on the calculation button to obtain calculated results.

INSTRUCTIONS ARE SHOWN, IN DISPLAY
BOX 3, FOR EACH ITEM ON THE PINK PULLDOWN MENU: When you select a mathematical
operation, with the pink pull-down menu, instructions and/or other information
that relate to the mathematics, will automatically appear in DISPLAY BOX 3. This usually consists of a few words,
describing the mathematical operation, and it may tell you which numbers to
enter in the left input box, and which numbers are to be entered in the right
input box.

NUMBERS MUST BE PLACED IN THE CORRECT
INPUT BOX: There are two input
boxes for numbers, one on the left, and the other on the right. If you do not enter the numbers in the
correct input box, you will obtain incorrect calculated results, or no
results. For example, if you want
to calculate 6 squared, (6x6=36) and you place the numbers in the wrong input
box, you will obtain the incorrect result of 2x2x2x2x2x2=64. The exponents are always placed in the
right input box.

WHEN ONLY ONE NUMBER IS NEEDED FOR A
CALCULATION, PLACE IT IN THE RIGHT INPUT BOX: When only one number is required,
the right input box is always used with this calculator, and in such a case the
left input box should not contain a number. Examples of mathematical operations that
require only one number are: calculating the values of trigonometric or
hyperbolic functions, and calculations that require only the radius of a circle
or sphere.

SYMBOLS USED IN THE PINK PULL-DOWN
MENU: Some of the symbols used in
the pink pull-down menu, might not be familiar to you, so you should always
check the instructions displayed in DISPLAY BOX 3, for each
mathematical operation you want to carry out. Keep in mind that the symbol used will
not provide all the information needed to understand a mathematical operation,
because of the properties of the left and right input boxes. For example,** ^** is
used for raising a number in the left input box, to the power of an exponent
placed in the right input box. If
the exponent is placed in the left input box, and the number in the right input
box, the calculated results would be incorrect.

TRIAL AND ERROR LEARNING: It is usually necessary to engage in
some trial and error learning with even the simplest software. Thus, you should test out the various
settings on the Database Scientific Calculator, and practice some trial and
error learning.

__The Design Concepts, and
Services Offered by the Author____ __

__Design Concept to Maximize User‑Friendliness:
For the Website____
and____ For The ____Database‑Scientific‑Calculator__

I designed the __Database‑Scientific‑Calculator____,__
and this website, in a way that would maximize efficiency and ease-of-use.
The ** Database‑Scientific‑Calculator**
has instructions placed next to input and display boxes, and it is laid out with
a simple structure, with large fonts. The website similarly has large
fonts, with a simple structure, and clearly written text. For example, the
download links on this website contain precise wording, to prevent confusion,
such as:

The website is on one long
webpage. This provides the convenience of scrolling down or up, from one
section to another, and it avoids the unnecessary complexity of pull-down menus,
and links to go from one page to another. However, I provided a hyperlink
table of contents as an alternative way of navigating the website.

Some of the material on this website
is technical. Thus, for an optimum level of comprehension, the reader
IDEALLY should have an advanced background in spreadsheets software, coupled
with knowledge of programming concepts and mathematics. However, I
structured each sentence with the goal of minimizing confusion, and maximizing
comprehension, for users with varying levels of technical knowledge. In
this regard, perfection is never possible, because users come from diverse
technical, cultural, and linguistic backgrounds.

I provided headings and subheadings
throughout this text. This allows the user to easily skip material that
they find difficult, or uninteresting. The headings and subheadings are
also displayed in the table of contents.

__Services Offered by the Author David
Alderoty__

I design and build user-friendly
software based calculation devices for arithmetic, accounting, currency exchange
rates, algebra, trigonometry, correlations, calculus, and databases with
built-in calculation devices. I can
create specialized versions of the Database‑Scientific‑Calculator, with built-in
mathematical functions, and storage and retrieval functionality that relate to
your specific business needs.

I also create attractive online
calculation devices for websites. I generally make these devices in the
Microsoft Excel, OpenOffice.org, and the JavaScript formats, but I can work with
other spreadsheet formats besides the above. I also create web
communication forms in JavaScript for websites. This includes forms with
built-in calculation devices.

I write instructions for the devices
I build. I can also write instructions for software and computer devices
created by others. In addition, I can write advertising for your websites,
products and services.

**For a list of websites with
calculation devices that I created, left click on these words, or go to the
following website:**** ****www.TechForText.com/Math**** **

I can provide the services mentioned
above on a fee-for-service basis, or possibly based on temporary or permanent
employment. If you are interested in my services, and want additional
contact information or more data on the services I offer, you can email me at **David@TechForText.com**** **or
**use a website communication form, by
left clicking on these words.**
My resume is online at: **www.David100.com/R** For a
list of all the services I offer see **www.TechForText.com** For a list of all my websites see **www.David100.com**** **

My name is David Alderoty, and I am
located in the USA, New York City. If you are a great distance from my
locality or are in another country, this is not important. I can provide
the above services worldwide, because the software and the writing services I
offer can be delivered through the Internet to any locality, providing there are
no governmental restrictions.

__If you want the table of contents
of this website scroll down__

** **

** **

** **

__Introduction to The Hyperlink Table of Contents
of this Website__

This website is more or less laid out
like a book, but it is on one long webpage. You can scroll up or down to
go from one topic to another. However, if you want to examine all the
sections and subsections of this website, use the __hyperlink table of
contents__, below this paragraph. To go to any section or subsection of
this website you can left click on the blue words that relate to the material
you want to read. The yellow highlighted words are sections, and the
un-highlighted words are subsections.

**If you want to go to the top
of the
website, left click on these words.**

__Table of Contents
of this Website__

**The Online Database‑Scientific‑Calculator** 3

**General Information, and Instructions
for the Database‑Scientific‑Calculator** 10

**A Brief Discussion, The
Calculator** 10

**The Design Concepts, and
Services Offered by the Author** 20

**Services Offered by the Author David Alderoty**. 23