Texas Instruments Titanium TI-89 User Manual

Constants and Measurement Units 291
Rules for User-Defined Unit Names
Rules for User-Defined Unit NamesRules for User-Defined Unit Names
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
Defining a UnitDefining a Unit
Defining a Unit
Define a unit the same way you store to a variable.

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)