Tutorials for the Itty Bitty Computer Calculators
All of the calculators offered on this site use the RPN method of data entry.
The first pocket calculator was developed by the Hewlett Packard company and
the RPN method is familiar to many people in the engineering and
scientific communities as the method used by all Hewlett Packard calculators
up until the mid 80s. Hewlett Packard still manufactures and sells the world's
most trusted financial calculator, the HP-12C, which was first introduced in
the early 1980s and is still the favorite of many professionals in the real
estate and financial industries.
Getting Started
If you're not familiar with RPN, why not begin by downloading a free copy of
our basic 5-function
calculator and then read through the short basic tutorial about performing simple calculations
with an RPN calculator. It won't cost you a cent, and you'll quickly learn
(in just six pages) how powerful and easy the RPN method is.
The information in the
basic RPN tutorial
applies to all of the calculators offered on this website.
Solving Financial Problems
Itty Bitty Computer offers two financial calculators, the
basic and
advanced
models. The basic
financial
calculator performs the five basic arithmetic functions of the
free calculator,
and has additional keys for solving problems involving what people in the
business world refer to as "the time value of money". The tutorial for
solving "time value of money" problems, with either the basic or advanced
financial calculators begins here.
The advanced
financial calculator does all of what the basic financial calculator does
and adds an additional keyboard for evaluating discounted cash flows, for
those situations that involve irregularly spaced disbursements and
receipts. The advanced model also offers some additional data editing
features that are not part of the basic model. The tutorial for using
the additional functions of the advanced financial calculator begins
here.
Statistical Calculator
For the benefit of people who have to frequently calculate basic statistical
measures like mean, median, mode, and standard deviation (of sample or
population), we offer the
basic statistical
calculator. This calculator will quickly calculate those numbers for
samples of up to 50 data points. The tutorial for using the the statistical
functions is
here.
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