Texas Instruments TI-89 Titanium User Manual page 8

® is the second function of the ´ key.
Note:
The calculator's Automatic Power Down™ (APD™) feature prolongs battery life by
turning the calculator off automatically following several minutes of inactivity. When you
turn on the calculator after APD:
• The display, cursor, and any error conditions are exactly the same as before APD.
• All settings and memory contents are retained.
APD does not function when a calculation or program is in progress, unless a
Note:
pause is specified in the calculation or program.
Getting Started 5