Texas Instruments Calculator User Manual page 7

The indicators along the top of the display tell you which keys are active
and offer information about the status of the calculator.
Indicator Meaning
2nd Press a key to select its second function.
INV Press a key to select its inverse trigonometric function.
HYP Press a key to select its hyperbolic function.
COMPUTE Press % to compute a value for the displayed variable.
Press ! to assign the displayed value to the displayed
ENTER
variable.
Press & V to change the setting of the displayed
SET
variable.
# $
Press " or # to display the previous or next variable in the
worksheet.
Note: To easily scroll up or down through a range of
variables, press and hold # or ".
Press & W to delete a cash flow or statistical data point.
DEL
Press & X to insert a cash flow or statistical data point.
INS
BGN TVM calculations use beginning-of-period payments. When
BGN
payments (END).
RAD Angle values appear in radians. When
angle values appear and must be entered in degrees.

The displayed value is entered in the selected worksheet.
The indicator clears following a computation.

The displayed value is computed in the selected worksheet.
When a value changes and invalidates a computed value,
the_indicator clears.
= The displayed variable is assigned the displayed value.
– The displayed value is negative.
Overview of Calculator Operations
is not displayed, TVM calculations use end-of-period
is not displayed,
RAD
3