To Do Simple Arithmetic - HP OmniBook 800 User Manual

HP Calculator "takes over" part of your OmniBook's keyboard and reassigns
functions to it. You can see these functions and the applicable keys on the
display of calculator buttons—for example, pressing the Q key takes the
square root of the number in the Calc line.
Hints
Use BACKSPACE to correct a single keystroke on the Calc line.
Use DEL to erase the entire Calc line and reset it to zero.

To do simple arithmetic

1. Type the calculation in the Calc line.
2. Press ENTER (or the = key).
Your OmniBook's HP Calculator application starts in algebraic mode, shown
by the letters ALG in the status line. When algebraic mode is active, you can
type a number into the Calc line, then type an arithmetic operator like +,
then type another number and press ENTER or the = key to see the answer.
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