Keyboard Map Legend ....................................................................................................... 6
Basic Features
Welcome to the HP 20b Financial Calculator ..................................................................... 7
Turning the Calculator On and Off...................................................................................... 7
Selecting a Language ......................................................................................................... 7
Adjusting the Display Contrast............................................................................................ 7
Cursor ................................................................................................................................. 7
Two Line Display ................................................................................................................ 8
The Mode Menu: Setting Preferences ................................................................................ 8
Changing the Calculation Mode........................................................................................ 10
Key Presses and the Secondary Function :Key .......................................................... 11
Annunciators..................................................................................................................... 11
The IKey .................................................................................................................. 12
The =Key ...................................................................................................................... 12
Using the Iand =Keys .......................................................................................... 12
Editing and Clearing Entries ............................................................................................. 13
The On/CE OKey .......................................................................................................... 13
The Reset :xMenu .................................................................................................... 13
Notes about Special Menus.............................................................................................. 13
Memory and the Memory Menu........................................................................................ 13
Accessing Menus and Menu Maps................................................................................... 14

Contents

Contents

Legal Notices

Revision History..................................................................................................................

2

HP 20b Business Consultant Keyboard

1

2 Mathematical Calculations

 

Mathematical Functions....................................................................................................

16

Number Entry and Display................................................................................................

16

Chain Mode ......................................................................................................................

17

Algebraic Mode.................................................................................................................

17

Reverse Polish Notation (RPN) Mode ..............................................................................

18

The RPN Stack .................................................................................................................

18

Last Number .....................................................................................................................

19

One-Number Functions and the Math Menu ....................................................................

22

The Math :sMenu.....................................................................................................

23

The Probability Sub-menu ................................................................................................

25

3