Texas Instruments TI-89 Guide Book

42 Chapter 2: Operating the Calculator
02OPER.DOC TI
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89/TI
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92 Plus: O
p
erating the TI
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89/TI
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92 Plus (English) Susan Gullord Revised: 02/23/01 1:06 PM Printed: 02/23/01 2:11 PM Page 42 of 44
Mode Description
Base
Lets you perform calculations by entering numbers in
decimal
(DEC)
, hexadecimal
(HEX)
, or binary
(BIN)
form.
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.
Custom Units
Lets you select custom defaults. The mode is dimmed
until you select
Unit System
,
3:CUSTOM
.
Language
Lets you localize the
TI
-
89 / TI
-
92 Plus
into one of
several languages, depending on which language
Flash applications are installed.
Modes
(continued)

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA