Getting started 1-19
To change views Each view is a separate environment. To change a view, 
select a different view by pressing  ,  ,   
keys or select a view from the VIEWS menu. To change 
to HOME, press  . You do not explicitly close the 
current view, you just enter another one—like passing 
from one room into another in a house. Data that you 
enter is automatically saved as you enter it. 
To save aplet 
configuration
You can save an aplet configuration that you have used, 
and transfer the aplet to other HP 39gs calculators. See 
“Creating new aplets based on existing aplets” on 
page 19-1.
Mathematical calculations
The most commonly used math operations are available 
from the keyboard. Access to the rest of the math 
functions is via the MATH menu ( ). 
To access programming commands, press   
CMDS. 
See “Programming commands” on page 18-13 for 
further information.
Where to start The home base for the calculator is the HOME view 
( ). You can do all calculations here, and you can 
access all   operations.
Entering 
expressions
• Enter an expression into the HP 39gs in the same left-
to-right order that you would write the expression. 
This is called algebraic entry.
• To enter functions, select the key or MATH menu item 
for that function. You can also enter a function by 
using the Alpha keys to spell out its name.
• Press   to evaluate the expression you have in 
the edit line (where the blinking cursor is). An 
expression can contain numbers, functions, and 
variables. 
HP 39gs English.book  Page 19  Wednesday, December 7, 2005  11:24 PM