Extending aplets 19-1
19
Extending aplets
Aplets are the application environments where you 
explore different classes of mathematical operations. 
You can extend the capability of the HP 39gs in the 
following ways:
• Create new aplets, based on existing aplets, with 
specific configurations such as angle measure, 
graphical or tabular settings, and annotations. 
• Transmit aplets between HP 39gs calculators via an 
infra red link.
• Download e-lessons (teaching aplets) from 
Hewlett-Packard’s Calculator web site.
• Program new aplets. See chapter 18, 
“Programming”, for further details.
Creating new aplets based on existing aplets
You can create a new aplet based on an existing aplet. 
To create a new aplet, save an existing aplet under a new 
name, then modify the aplet to add the configurations 
and the functionality that you want. 
Information that defines an aplet is saved automatically 
as it is entered into the calculator. 
To keep as much memory available for storage as 
possible, delete any aplets you no longer need.
Example This example demonstrates how to create a new aplet by 
saving a copy of the built-in Solve aplet. The new aplet is 
saved under the name “TRIANGLES” contains the 
formulas commonly used in calculations involving 
right-angled triangles.
HP 39gs English.book  Page 1  Wednesday, December 7, 2005  11:24 PM