Texas Instruments Titanium TI-89 User Manual

Constants and Measurement Units 292
Notes:
• User-defined units are displayed in lowercase characters, regardless of the case you
use to define them.
• User-defined units such as _dm are stored as variables. You can delete them the
same as you would any variable.
For example, to define a dekameter unit:
10_m !_dm
To define an acceleration unit:
_m/_s^2 !_ms2
To calculate 195 blinks in 5 minutes as
_blinks/_min:
195_blinks/(5_min)
definition !_newUnit
For !, press 9
Assuming unit
defaults for Length
and Time are set to
_m and _s.
Assuming unit
default for Time is
set to _s.

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)