Basic/Input Functions

Function Key Description
ON Turns the calculator off.
f (alt) Gain access to the "yellow" functions. The f button doesn't have a function of its own, it is used to change the function of another button (ie: the function written in yellow immediately above the button).
g (ctrl) Gain access to the "blue" functions. It is used to change the function of a button to the function written in blue immediately below the button.
Enter Used to terminate numeric input and push a value onto the stack.
BSP Backspace. Erases one character of input. Also used to clear error messages from the screen.
clear PREFIX Clear a pending two-part function. Functions that require multiple buttons must be terminated in this way.
[0-9]   The digits [0-9] are used to input values or as arguments to other functions. Obviously, the OCT and BIN modes do not allow digits beyond 7 and 1 respectively.
decimal The decimal point button is only used in the Float mode.
[A-F]   The letters [A-F] are used as digits in the HEX mode.
EEX Enter Exponent. This button is used for entering scientific notation (float mode only).
CHS Change sign. Used to toggle between a negative and positive value. If pressed after EEX, it toggles the sign of the exponent.