Texas Instruments Titanium TI-89 User Manual

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Note: If you don’t need to save the current variable, use it as a scratchpad. The next time
you need a variable for temporary data, clear the current variable and re-use it. This lets
you enter temporary data without wasting memory by creating a new variable each time.
3. Move to column 2, and define its column
header so that it is twice the value of
column 1.
DATA is shown in the upper-left corner to
indicate that the list variable was
converted to a data variable.
Press B † 2 p j C 1 ¸
4. Move to the column 2 header cell to show
its definition in the entry line.
When the cursor is on the header cell,
you do not need to press † to define it.
Simply begin typing the expression.
Press 2 C C
5. Clear the contents of the variable.
Simply clearing the data does not convert
the data variable back into a list variable.
Press , 8 ¸
Steps and keystrokes Display
Πmeans the cell is in
a defined column.

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)