HP 30b - Business Professional Calculator - The Shift Key; The Input Key

2 Getting Started
• To specify the primary function on the upperface of the key, press the
key alone.
• To specify the shifted function printed in blue on the lower face of the
key, press and release the
: key, followed by the desired function
key.
• To specify the function printed above a key, press and hold
: and
simultaneously press the key below the printed function.
The Shift Key
Pressing the shift key,:, turns on a status indicator called an annunciator
at the top of the display. If you press
: once again, or press a function
key, the shift annunciator turns off. There are a total of 12 annunciators.
When displayed, each signifies the status of the calculator in certain opera-
tions. When applicable, the descriptions below identify when an indicator
appears on screen.
In this manual, the highlighted portion of the key symbol, or symbols, repre-
sents the active function of the key. Unless otherwise indicated, press and
release the desired key, or key combination in order from left to right. You do
not need to press and hold the keys unless you require the Black-Scholes Cal-
culation menu (Black S). Secondary, or shifted functions, are preceded by the
shift
key symbol, :.
The Input Key
The Input key,I, is used to input values for variables and execute
menu items.
The
I key is also used in Reverse Polish Notation (RPN) mode to enter