Texas Instruments TI-89 Titanium User Manual page 12

To type most characters, press 2 and the corresponding key. Press N to close the
map.
Example: Use the keyboard map to find the "not equal to" symbol (ƒ) shortcut and enter
the symbol in the Program Editor.
Press
8 "
¥ Á
Getting Started
Result
Symbol
displayed at
cursor location.
9