Texas Instruments TI-89 Manual Book page 59

Modes
(continued)
42 Chapter 2: Operating the Calculator
Mode Description
Lets you perform calculations by entering numbers in
Base
decimal
Unit System Lets you enter a unit for values in an expression,
such as 6_m * 4_m or 23_m/_s * 10_s, convert values
from one unit to another within the same category,
and create your own user-defined units.
Lets you select custom defaults. The mode is dimmed
Custom Units
until you select
Lets you localize the
Language
several languages, depending on which language
Flash applications are installed.
(DEC) , hexadecimal (HEX)
,
Unit System 3:CUSTOM
TI-89 / TI-92 Plus
, or binary (BIN) form.
.
into one of