**From ****KC Multimedia
and Design Group****...**# JRPN^{tm} - the Java^{tm }Scientific
Calculator
**Version
1.1.2**** - March 20, 1999**
**Overview****
|| ****Features****
|| ****System Requirements****
|| ****How RPN works**
**Download
JRPN**
JRPN is available in several formats for Windows, Mac,
UNIX/Linux and generic Java platforms. JRPN includes a readme file to help you get
started.
## What's New
Version 1.1.2 addresses some MRJ 2.1 (Apple) specific
issues. For Windows, JRPN is now bundled with JDK 1.1.7,
which corrects a bug involving cut/paste to the system
clipboard under NT.
JRPN is a pop-up 35-function virtual scientific
calculator that uses the Reverse Polish Notation method
for data entry. Unlike an algebraic calculator which has
an "equals" button, a Reverse Polish Notation
(RPN) calculator does not use an "equals" key.
Hewlett-Packard handheld calculators are the best-known
examples using RPN. Most RPN users consider it to be
faster and superior to algebraic data entry.
JRPN features continuous (file-based)
"memory" and 10 persistent storage registers.
Styled to look like a calculator, JRPN responds to either
keyboard or mouse input. JRPN also supports copying
calculated values into the system clipboard for pasting
into some other application on the desktop.
## System Requirements
JRPN requires a Java 1.1.7 runtime. For Windows, we
include the necessary Java runtime in the download file.
On the Mac, you must have Apple's MRJ 2.1
installed.
It's easy and logical. The calculator works with an
internal register stack. When you enter numbers, you push
operands onto the stack, When you press an operator, it
operates on the numbers in the stack.
For example, let's add two numbers, 125 and 312. Key
in 125 and press ENTER. Key in 312 and press '+'. The
answer, 437 is displayed. Now to subtract 37, simply key
in 37 and press '-'. The answer, 400, is displayed.
Notice that we have used one less keystroke in this
simple example than would have been required with an
algebraic calculator with an '=' key. The stack makes it
easy to perform chained calculations.
**Copyright © 1999 by Rocky Fikki & Bill
Giel / KC Multimedia and Design Group, Inc.**
All Rights Reserved.
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