Texas Instruments TI-89 Titanium User Manual

Symbolic Manipulation 225
Note: Use 2 ° to view a list of defined variables, as described in Memory and
Variable Management.
Deleting a Defined Variable
You can “undefine” a defined variable by deleting it.
To delete: Do this:
One or more specified variables Use the DelVar function.
You can also delete
variables by using the
VAR-LINK screen
(2°) as
described in Memory and
Variable Management.
All one-letter variables (a – z) in the
current folder.
Note: For information about folders,
refer to the Calculator Home Screen
module.
From the Home screen
Clean Up menu, select
1:Clear a-z. You will be
prompted to press ¸ to
confirm the deletion.

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches