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basic.htp
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1997-09-11
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<meta http-equiv="refer" content="file:coolcalc.htc">
<title>Basic Operation</title>
</head>
<body bgcolor="#FFFFFF">
<h2>Basic Operation</h2>
<p>This section explains the following:</p>
<dl>
<dt>How does it all work?</dt>
<dt>What the heck is RPN?</dt>
<dt>How do I find out what do all of the buttons do?</dt>
<dt>What are "Formula Screens"?</dt>
</dl>
<h3><a name="b1"></a>How does it all work?</h3>
<blockquote>
<p>When you launch CoolCalc, you'll see the main menu screen.
This screen is a gateway to various calculators and formula
screens. Simply tap any one of the buttons to go to that
place. There are three basic calculators that come with
CoolCalc: a Business Calculator, an RPN Business Calculator,
and an RPN Scientific calculator.</p>
</blockquote>
<h3><a name="b2"></a>What the heck is RPN?</h3>
<blockquote>
<p>RPN stands for "Reverse Polish Notation"; this
is a system that was patented by Hewlett-Packard in the 1970s
as an alternate way of doing calculations that is used mostly
by engineering folks. If you look at one of the RPN
calculator screens, you won't see an equals key. This is OK.
Instead, you'll see a key labeled "ENT" or
"Enter". The "Enter" key saves the value
in the display for use later. This is best illustrated by
some examples:</p>
</blockquote>
<blockquote>
<p><strong>Calculate 6x3:</strong></p>
</blockquote>
<blockquote>
<blockquote>
<p>Non-RPN: press <strong>6</strong>, then <strong>X</strong>,
then <strong>3</strong>, then <strong>=</strong></p>
<p>RPN: press <strong>6</strong>, then <strong>ENT</strong>,
then <strong>3</strong>, then <strong>X</strong></p>
</blockquote>
<p>RPN becomes more useful when doing complicated
calculations, as shown in this example:</p>
</blockquote>
<blockquote>
<p><strong>Calculate 3x(4+5):</strong></p>
</blockquote>
<blockquote>
<blockquote>
<p>Non-RPN: press <strong>3, X, (, 4, +, 5, ), =</strong></p>
<p>RPN: press <strong>3, ENT, 4, ENT, 5, +, X</strong></p>
</blockquote>
</blockquote>
<h3><a name="b3"></a>How do I find out what do all of the buttons
do?</h3>
<blockquote>
<p>Hold down the Alt key, and tap a button. You'll get a
brief description of what that button does. Note that some of
the calculators have blank buttons; these blank buttons can
be assigned to special functions of your choosing (see Macros
in the Advanced section for details on how to do this).</p>
</blockquote>
<h3><a name="b4"></a>What are "Formula Screens"?</h3>
<blockquote>
<p>One of the nifty features of CoolCalc is the ability to
set up formula screens. We've included a few handy things
such as some metric conversions, loans, and time value of
money calculations. You can add your own as well, as you'll
see later on. Go to the main menu, select <strong>Formulas</strong>,
and explore a little. You can always return to the main menu
by tapping on the <strong>home</strong> button.</p>
<p>Formula screens are the friendly cousins of spreadsheets,
with the advantages of having a nicer interface, and the
ability to do "what if" scenarios very easily. For
example, if you are a Realtor working on a loan with a
customer, you can set the amount of the loan, and calculate
the payment. Or, you can set the desired monthly payment, and
figure out how much money your client can borrow.</p>
</blockquote>
</body>
</html