Building Your Aplet Library; Saving And Sharing Aplets - HP 39gs Quick Start Manual

Building Your Aplet Library

As shown in the previous Aplet summaries, the HP 39gs comes with a set of 13 built-in Aplets. These Aplets are in Read-Only Memory (ROM) and cannot
be deleted, so pressing the APLET key will always give you access to at least 13 Aplets. However, you can add and delete other Aplets from your Library.
The following sections show you how to manage your Aplet Library.

Saving and Sharing Aplets

This section contains step-by-step instructions for creating, saving, and sharing an Aplet called Fibonacci that is based on the Sequence Aplet.
1. Press APLET, highlight the Sequence Aplet, and press the RESET menu key to clear this Aplet of data. Press the
OK menu key to complete the reset and then press the START menu key.
2. The Sequence Aplet starts in the Symbolic view, with ten sequence definitions (Figure 35). The Fibonacci
Sequence definition is:
U1(1)=1
U1(2)=1
U1(N)=U1(N-2)+U1(N-1)
Enter this definition of U1 as shown in Figure 36.
Tip: use the menu keys to enter (N-2), (N- 1 ), etc.
52 Getting Started
Description Display
Figure 35
Figure 36