HP 38g Graphing Calculator - Manual (Page 45)

Aplet The variable types in the table below are aplet variables that
Variables you use to define aplet functions and to store some kinds of
aplet data. They are usually found in the Symbolic view or the
Numeric view of an aplet.
Aolet Cateeorv Available Names
Function FI through P9 and FO
(Symbolic view)
Parametric XI, Y1 through X9, Y9 and XO,
YO (Symbolic view)
Polar R1 through R9 and RO
(Symbolic view)
Sequence U1 through U9 and UO
(Symbolic view)
Solve El through E9 and EO
(Symbolic view)
Statistical data Cl through C9 and CO
(Numeric view)
As you load new aplets in the HP 38G, their names and
variables will be added to the VAR menu.
In addition, there are other aplet variables that are record
settings, such as those in the Setup views. These types of
variables (like NumStart and Xtick) are listed in chapter 8,
Programming, since you do not need to know their names
except when programming.
Mathematical Calculations 2-9