Programs added to your device at the factory are stored in ROM (read-only memory). You can't remove or modify this software, and you'll never accidentally lose ROM contents. You can install any program created for your device, as long as your device has enough storage space. One popular place to find programs for your device is on the Internet.
Programs and data files added to your device after factory installation are stored in RAM (random access memory). On devices with permanent storage, your new program is placed in permanent storage.
See also