This is the user manual for HP 20b Business Consultant and HP 30b Business Professional financial calculators.
This manual provides detailed instructions for using the HP 20b Business Consultant and HP 30b Business Professional financial calculators. It covers basic operation, menu navigation, mathematical functions, programming, and special financial calculations such as TVM, bonds, and Black‑Scholes.
Additional sections describe error messages, battery replacement, warranty information, and regulatory compliance. The guide includes keyboard maps, sample problems, and step‑by‑step procedures for common business calculations.
| Display | 2‑line alphanumeric scrolling |
|---|---|
| Power‑off timer | Auto off after ~5 minutes |
| Contrast adjustment | Hold O and press + or – |
Press O to turn the calculator on and press :a to turn it off.