Texas Instruments TI-89 Titanium Short User Manual page 142

The TI-89 Titanium has one built-in folder named
create other folders and designate a user-created folder as the current
folder, all variables are stored in the
variable or a variable with a reserved name can be stored in the
folder only.
Example of variables that
can be stored in MAIN only
Window variables
( ,
xmin xmax
Table setup variables
, @
(
TblStart
Y= Editor functions
( , etc.)
y1(x)
By creating additional folders, you can store independent sets of user-
defined variables (including user-defined functions). For example, you
can create separate folders for different TI-89 Titanium applications
(Math, Text Editor, etc.) or classes. You can store a user-defined variable
in any existing folder.
The user-defined variables in one folder are independent of the variables
in any other folder. Therefore, folders can store separate sets of variables
with the same names but different values.
Name of current folder
136
, etc.)
, etc.)
Tbl
folder by default. A system
MAIN
MAIN
System variables
Variables
User-defined
a=1, b=2, c=3
f(x)=x³+x²+x
ALG102
User-defined
b=5, c=100
f(x)=sin(x)+cos(x)
DAVE
User-defined
a=3, b=1, c=2
f(x)=x²+6
MATH
User-defined
a=42, c=6
f(x)=3x²+4x+25
Memory and Variable Management
. Unless you
MAIN
MAIN