__Calculation Devices for
Algebra,__

__With Trigonometry, and
Related Theories and__

__Techniques for Creating
Calculation Devices,__

__In the JavaScript and
Spreadsheet Formats__

__ __

__Created By____ David@TechForText.com, ©2010__

__To contact the author use the
above email address, or__

__Left click on these words for a website
communication form.__

**This
webpage provides a list of links to nine websites, with calculation devices, I
created in the summer of 2010, for Algebra and related mathematical concepts.
Some of these calculation devices are quite unusual, and they are provided
without charge, and are available in three formats: Microsoft Excel, OpenOffice
Calc, and JavaScript. The Excel and OpenOffice formats are available for
download, and the JavaScript versions function online. **

** **

**Four of the nine
websites are essentially short e-books, with 3000 to 10,000 words, and a
hyperlinked table of contents. I wrote this material to provide technical
information for the creation of dedicated calculation devices in the JavaScript
and spreadsheet formats.**

** **

**The nine websites, with the
calculation devices are listed below this paragraph, but I am presenting links
to two of the most interesting online devices here. If you a click on a blue
link below, a functioning calculation device will open directly from this
webpage:**

**www.TechForText.com/Multiple-Algebraic-Calculator/P
This is the largest JavaScript device that I have ever created, and it is the
largest I have ever seen on the Internet. It is about 15 pages long, carries
out over**** 75 calculations simultaneously**** involving algebra,
calculus, and trigonometry. **

** **

**www.TechForText.com/PolyTrig-Calculator/P
This device carries out over 30 trigonometric
calculations simultaneously, when the user enters numbers for the height and
base of a right triangle. **

__A List of Nine
Websites, with Calculation Devices,__

__And Related
Information __

** **

Note: All of the following websites have calculation devices in three formats: Microsoft Excel, OpenOffice Calc, and JavaScript. To obtain the calculation devices, or related technical information, go directly to the website by left clicking on a blue link, on top of each of the following paragraphs. However, the online JavaScript versions of the calculation devices are also accessible from this webpage, by left clicking on the green highlighted blue link, which is located at the bottom of each of the following paragraphs.

**Website
1)**

This website is an
e-book with over 10,000 words, and a hyperlinked
table of contents, and it contains theories and techniques for the
design of calculation devices. It presents a novel use of spreadsheet
software, as a computer language, for creating dedicated calculation devices in
the JavaScript and spreadsheet formats.

\

**www.TechForText.com/Algebra/Created-by-SubCellDesignations/index.htm**

**www.TechForText.com/Algebra/DefiningVariablesInTermsOfCells**

__ __

__ __

__Website 2)__

__www.TechForText.com/Algebraic-Calculator-For-2-Unknowns__

This website is an
e-book, with 6280 words, and a hyperlinked table of contents, and it provides
the __Algebraic-Calculator-For-Two-Unknowns__** .** This

**http://www.techfortext.com/Algebraic-Calculator-For-2-Unknowns/AlgebraicCalculatorJavaScript.htm**

__Website 3)__

**www.TechForText.com/Algebraic-Calculator-For-3-Unknowns**

This website provides the **Algebraic-Calculator-For-3-Unknowns. ** This
Calculator solves three equations simultaneously, for X, Y, and Z, that are
similar to the following: AX+BY+KZ=M, DX+EY+FZ=N, and GX+HY+JZ=W. If you want
to access the online version of the

**www.TechForText.com/Algebraic-Calculator-For-3-Unknowns/P**

__Website 4)__

** **

**www.TechForText.com/Quadratic-Equation-Calculator**

This website provides a device to
solve quadratic equations: ** The Quadratic
Equation Calculator.** The website also provides some
technical information, with a hyperlinked table of contents. The online
version of the

**http://www.techfortext.com/Algebraic-Calculator-For-2-Unknowns/AlgebraicCalculatorJavaScript.htm**

__Website 5)__

**www.TechForText.com/Exponential-Algebraic-Calculator**

This website is an e-book with
3009 words, and a hyperlinked table of contents. __This website provides a
calculation device (Exponential Algebraic
Calculator) for solving equations with exponents, that are
similar to: __

**http://www.techfortext.com/Exponential-Algebraic-Calculator/Exponential-Algebraic-P/index.htm**

** **

__Website 6)__

** **

**www.TechForText.com/Algebraic-Integral-Calculator**

This website provides the **Algebraic Integral Calculator.** This
calculation device is quite unusual.

If you want to access the online
version of the __Algebraic Integral Calculator__ left click on the following
link:

**http://www.techfortext.com/Algebraic-Integral-Calculator/Calculator-Algebraic-Integral/index.htm**

__Website 7)__

**www.TechForText.com/PolyTrig-Calculator**

This website provides
the** ****PolyTrig Calculator**. This calculation device carries out over 30
trigonometric calculations simultaneously, when the user enters numbers for the
height and base of a right triangle. The

**www.TechForText.com/PolyTrig-Calculator/P**

__Website 8)__

**www.TechForText.com/Multiple-Algebraic-Calculator**

This website is an
e-book, with a hyperlinked table of contents. It provides over 4500 words of
technical information, and the **Multiple-Algebraic-Calculator**. This Calculator is
quite unusual, and it is approximately the size of a 15 page document. The

**www.TechForText.com/Multiple-Algebraic-Calculator/P**

__Website 9)__

**www.TechForText.com/Algebraic-Trig-Calculators**

This website provides **Ten Algebraic Trig
Calculators.** This consists of 10 calculation devices on a single page, but
each device functions independently. All of the Calculators solve various
types of algebraic equations that involve trigonometry. If you want to access
the online JavaScript version of these Calculators left click on the following
link:

**www.TechForText.com/Algebraic-Trig-Calculators/P**

__System Requirements For the Dedicated__

__Calculation Devices From the Nine __

__Website____s Listed Above__

__The
Software Requirements for the____ __

__JavaScript
Calculation Devices__

The JavaScript calculation devices I created will function
with any modern operating system and Internet browser that has ** JavaScript
functionality.** This includes the most popular operating systems, such
as Microsoft Windows, Macintosh, and Linux, but I have only tested the
calculation devices with Microsoft Windows.

Most, if not all, modern browsers
have JavaScript functionality. If you do not have a browser that supports
JavaScript, or want to upgrade, you can obtain browsers for free, by
downloading them from the websites listed at the end of this paragraph. To go
to any of the websites listed, left click on a blue web link. If a link fails
to function, it is most likely because the web address was changed, by the
manufacture of the browser. If this happens, you should do an Internet search,
preferably with Google, using the name of the browser, and the word download,
such as __Internet Explorer download__.

**Internet Explorer: http://www.microsoft.com/windows/internet-explorer/**

** **

**Opera: http://www.opera.com/**

** **

**Firefox: http://en-us.www.mozilla.com/en-US/**

** **

**Google Chrome: http://www.google.com/chrome/**

** **

**Seamonkey: http://www.seamonkey-project.org/**

** **

**Flock:**** http://flock.com/download/**

** **

__Spreadsheet
Calculation Devices__

The calculation devices that I created in the spreadsheet
format require Microsoft Excel, or the OpenOffice.org software package, and the
Windows operating system. If you do not have Microsoft Excel, you should
download the OpenOffice.org software package, because it is free. This
software package is almost as good as Microsoft Office, and it contains
spreadsheet software (__OpenOffice Calc__) that has most of the
functionality of Microsoft Excel.

**To download the free
OpenOffice software package, left click on these words, or go to the following
website: www.OpenOffice.org**

__ __

__The
Computer Requirements for the Calculation Devices____ __

The JavaScript and spreadsheet calculation devices I created for the nine websites, listed above, do not require much computer resources. Any computer that has enough memory and processing power to run a modern operating system, with spreadsheet software, will have enough power for all of the calculation devices provided from the nine websites.

Incidentally, highly complex calculation devices, involving thousands of formulas, may require a relatively powerful computer, to function optimally. However, the most complex device created for the nine websites listed above, involve less than 150 formulas.

__Services Offered by the
Author__

__General Information About the
Design of the Website____s __

The nine websites with calculation devices, as well as
this website, were designed to maximize usability or user-friendliness. The
text on all of the websites, are presented with relatively large fonts. The
paragraphs are relatively short, and the sentence structure and wording were
written to maximize comprehension*. The websites have a very simple layout, on
a single page. The websites that have large amounts of text have a hyperlinked
table of contents. This makes it easy to __navigate intuitively__, by
scrolling down or up, or by clicking on links. All the links for downloads and
other websites are also written with large fonts, and clearly marked as links,
such as with the following words: * left click on these words*.

*Note: Most of the information on the nine websites is technical, and it requires advanced knowledge in spreadsheet software and mathematics, for maximum comprehension. Individuals, who do not have this knowledge, will probably understand portions of the text.

__Services Offered by
the Author David@TechForText.com__

**I design and build user-friendly software based
calculation devices for arithmetic, accounting, currency
exchange rates**

**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.**

**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.**

**I am located in the USA. If you are a great distance from
my locality or are in another country, this is not important. I can provide
these services worldwide, because the software and websites I make can be
delivered through the Internet to any locality, providing there are no
governmental restrictions.**

**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**

** **

**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 resume is online at: www.David100.com/R**

**To return to the
top of this website left click on these words**