Table of Contents
HP-20b Financial Calculator
Quick Summary
| Specifications | |
|---|---|
Manufacturer: Hewlett-Packard
|  |
Overview
The HP-20b “Business Consultant” calculator was released in July 2008. The calculator offers a number of features for financial and business users:
| TVM | IRR |
| NPV | NUS |
| amortization | depreciation |
| bonds | yield and accrued interest |
| interest conversion | list-based cashflow analysis |
| cashflows | break-even analysis |
In addition to financial functions, it includes a collection of statistical and mathematical functions:
| list-based 1 and 2-variable statistics | mean |
| standard deviation | population deviation |
| standard error | forecasting |
| correlations and covariance | basic math functions: +, -, X, ÷, %, 1/x, +/-, square root |
| factorials | combinations |
| permutations | rounding |
| random number | higher math functions: LOG, LN, 10x, pi, trigonometry, probability |
Users Manual
Hewlett-Packard has a collection of official HP-20b information posted here.
Errata, hints and kinks
Learning Modules
A series of very informative learning modules have been created by Gene Wright for HP. These modules expand in much greater detail on the features and functionality of the calculator. Each includes many examples, and the modules are divided into common use cases.
Hacking (repurposing) the HP-20b
The HP-20b is a new breed of calculator for Hewlett-Packard, and one that reflects a casual open maturity. A group of HP calculator enthusiasts have begun work on repurposing the HP-20b for other uses, primarily enabled by accessing the JTAG connector on the main circuit board. This is a work in progress, although the group is actively soliciting individuals to help with this effort.
