Texas Instruments TI-89 Titanium User Manual

Constants and Measurement Units 277
Rules for User-Defined Unit Names
The naming rules for units are similar to variables.
• Can have up to 8 characters.
• First character must be an underscore. For
_, press:
8 5
• Second character can be any valid variable name character except
_ or a digit. For
example, _9f is not valid.
• Remaining characters (up to 6) can be any valid variable name character except an
underscore.
Defining a Unit
Define a unit the same way you store to a variable.

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