Texas Instruments BA II PLUS - Manual (Page 6)

2 Overview of Calculator Operations
• The Constant Memory™ feature retains all worksheet values and
settings, including the contents of the 10 memories and all format
settings.
Automatic Power Down™ (APD™) Feature
To prolong battery life, the Automatic Power Down (APD) feature turns
off the calculator automatically after about five minutes of inactivity.
The next time you press $, the calculator turns on exactly as you left
it, saving display settings and stored memory and any pending
operations or error conditions.
Selecting 2nd Functions
Reading the Display
The display shows the selected variable labels with values up to 10 digits.
(The calculator displays values exceeding 10 digits in scientific notation.)
The primary function of a key is printed on the key itself.
For example, the primary function of the
$ key is to
turn on or turn off the calculator.
Most keys include a second function printed above the key.
To select a second function, press
& and the
corresponding key. (When you press &, the 2nd indicator
appears in the upper left corner of the display.)
For example, pressing & U exits the selected
worksheet and returns the calculator to the standard-
calculator mode.
Note: To cancel after pressing &, press & again.