Texas Instruments TI-84 - Manual (Page 523)

Chapter 18: Memory and Variable Management 520
4. Press
} and † to move the selection cursor (4) next to the item you want to delete,
and then press
{. The variable is deleted from memory. You can delete individual
variables one by one from this screen. No warning will be given to verify the deletion.
Note: If you are deleting programs or Apps, you will receive a message asking you to
confirm this delete action. Select 2:Yes to continue.
To leave any variable screen without deleting anything, press
y 5, which
displays the home screen.
You cannot delete some system variables, such as the last-answer variable Ans and
the statistical variable RegEQ .